この製品のドキュメントセットは、偏向のない言語を使用するように配慮されています。このドキュメントセットでの偏向のない言語とは、年齢、障害、性別、人種的アイデンティティ、民族的アイデンティティ、性的指向、社会経済的地位、およびインターセクショナリティに基づく差別を意味しない言語として定義されています。製品ソフトウェアのユーザインターフェイスにハードコードされている言語、RFP のドキュメントに基づいて使用されている言語、または参照されているサードパーティ製品で使用されている言語によりドキュメントに例外が存在する場合があります。シスコのインクルーシブ ランゲージの取り組みの詳細は、こちらをご覧ください。
シスコは世界中のユーザにそれぞれの言語でサポート コンテンツを提供するために、機械と人による翻訳を組み合わせて、本ドキュメントを翻訳しています。ただし、最高度の機械翻訳であっても、専門家による翻訳のような正確性は確保されません。シスコは、これら翻訳の正確性について法的責任を負いません。原典である英語版(リンクからアクセス可能)もあわせて参照することを推奨します。
このドキュメントでは、Nexus 9000のDHCPリレーエージェントの適切な設定を確認する手順について説明します。
Cisco NXOS®では、次の項目に関する知識があることが推奨されます。
このドキュメントは、Nexus 9000などの特定のハードウェアに限定されます
このドキュメントの情報は、特定のラボ環境にあるデバイスに基づいて作成されました。このドキュメントで使用するすべてのデバイスは、クリアな(デフォルト)設定で作業を開始しています。本稼働中のネットワークでは、各コマンドによって起こる可能性がある影響を十分確認してください。
クライアントとサーバ間でDHCPパケットを転送するDHCPリレーエージェントを実行するようにデバイスを設定できます。この機能は、クライアントとサーバが同じ物理サブネット上にない場合に役立ちます。リレーエージェントはDHCPメッセージを受信し、新しいDHCPメッセージを生成して別のインターフェイスに送信します。
NexusスイッチはDHCPリレーとして動作し、サーバからクライアントにIPを配信します。
1)クライアントの設定を確認する(IPアドレスが割り当てられていない)
Client# show interface vlan 10 Vlan10 is up, line protocol is up, autostate enabled Hardware is EtherSVI, address is 0062.ecf3.04b3 MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive not supported ARP type: ARPA Last clearing of "show interface" counters never L3 in Switched: ucast: 0 pkts, 0 bytes
2) DHCP設定を確認する
Switch1# show run dhcp ip dhcp snooping service dhcp ip dhcp relay ipv6 dhcp relay interface Vlan10 ip dhcp relay address 192.168.1.2 ip dhcp snooping vlan 1,10
3)サーバへの接続を確認する
Switch1# ping 192.168.1.2 PING 192.168.1.2 (192.168.1.2): 56 data bytes 64 bytes from 192.168.1.2: icmp_seq=0 ttl=253 time=1.678 ms 64 bytes from 192.168.1.2: icmp_seq=1 ttl=253 time=1.329 ms 64 bytes from 192.168.1.2: icmp_seq=2 ttl=253 time=1.742 ms 64 bytes from 192.168.1.2: icmp_seq=3 ttl=253 time=1.382 ms 64 bytes from 192.168.1.2: icmp_seq=4 ttl=253 time=1.241 ms --- 192.168.1.2 ping statistics --- 5 packets transmitted, 5 packets received, 0.00% packet loss round-trip min/avg/max = 1.241/1.474/1.742 ms Switch1# Switch1# show ip route 192.168.1.2 IP Route Table for VRF "default" '*' denotes best ucast next-hop '**' denotes best mcast next-hop '[x/y]' denotes [preference/metric] '%<string>' in via output denotes VRF <string> 192.168.1.2/32, ubest/mbest: 1/0, attached *via 192.168.1.2, Eth1/48, [250/0], 02:13:58, am Switch1#
4)次に、DCHPの統計情報を見て、情報が正しく送信されていることを再確認します。
Switch1# show ip dhcp relay statistics interface vlan 10 ---------------------------------------------------------------------- Message Type Rx Tx Drops ---------------------------------------------------------------------- Discover 1 1 0 Offer 1 1 0 Request(*) 1 1 0 Ack 1 1 0 Release(*) 0 0 0 Decline 0 0 0 Inform(*) 0 0 0 Nack 0 0 0 ---------------------------------------------------------------------- Total 4 4 0 ---------------------------------------------------------------------- DHCP server stats: ---------------------------------------------------------------------------- Server Vrf Request Response ---------------------------------------------------------------------------- 192.168.1.2 2 2 ---------------------------------------------------------------------- DHCP L3 FWD: Total Packets Received : 0 Total Packets Forwarded : 0 Total Packets Dropped : 0 Non DHCP: Total Packets Received : 0 Total Packets Forwarded : 0 Total Packets Dropped : 0 DROP: DHCP Relay not enabled : 0 Invalid DHCP message type : 0 Interface error : 0 Tx failure towards server : 0 Tx failure towards client : 0 Unknown output interface : 0 Unknown vrf or interface for server : 0 Max hops exceeded : 0 Option 82 validation failed : 0 Packet Malformed : 0 DHCP Request dropped on MCT : 0 Relay Trusted port not configured : 0 * - These counters show correct value when switch receives DHCP request packet with destination ip as broadcast address. If request is unicast it is being HW switched Switch1# Switch1# show ip dhcp global statistics Packets processed 130 Packets received through cfsoe 0 Packets forwarded 24 Packets forwarded on cfsoe 0 Total packets dropped 106 Packets dropped from untrusted ports 0 Packets dropped due to MAC address check failure 0 Packets dropped due to Option 82 insertion failure 0 Packets dropped due to o/p intf unknown 0 Packets dropped which were unknown 0 Packets dropped due to no trusted ports 106 Packets dropped due to dhcp relay not enabled 0 Packets dropped due to no binding entry 0 Packets dropped due to interface error/no interface 0 Packets dropped due to max hops exceeded 0 Packets dropped due to Queue full 0 Switch1#
1) ethanalyzerを実行して、統計情報が正しいことを確認します。
Switch1# ethanalyzer local interface inband display-filter bootp limit-captured-frames 0 Capturing on inband 2023-07-18 21:30:01.935789 0.0.0.0 -> 255.255.255.255 DHCP DHCP Discover - Transaction ID 0x64b6400b 2023-07-18 21:30:01.937789 192.168.10.1 -> 192.168.1.2 DHCP DHCP Discover - Transaction ID 0x64b6400b 2023-07-18 21:30:03.938596 192.168.1.2 -> 192.168.10.1 DHCP DHCP Offer - Transaction ID 0x64b6400b 2023-07-18 21:30:03.938659 192.168.1.2 -> 192.168.10.1 DHCP DHCP Offer - Transaction ID 0x64b6400b 2023-07-18 21:30:03.940103 192.168.10.1 -> 255.255.255.255 DHCP DHCP Offer - Transaction ID 0x64b6400b 2023-07-18 21:30:07.939208 0.0.0.0 -> 255.255.255.255 DHCP DHCP Request - Transaction ID 0x64b6400b 2023-07-18 21:30:07.941220 192.168.10.1 -> 192.168.1.2 DHCP DHCP Request - Transaction ID 0x64b6400b 2023-07-18 21:30:07.941848 192.168.1.2 -> 192.168.10.1 DHCP DHCP ACK - Transaction ID 0x64b6400b 2023-07-18 21:30:07.941897 192.168.1.2 -> 192.168.10.1 DHCP DHCP ACK - Transaction ID 0x64b6400b 2023-07-18 21:30:07.942693 192.168.10.1 -> 255.255.255.255 DHCP DHCP ACK - Transaction ID 0x64b6400b
2) Ethanalyzerには、キャプチャされたトラフィックのヘッダーを含む追加情報を提供する詳細オプションがあります。
ethanalyzer local interface inband display-filter "((eth.addr==<MAC_address> and bootp ))" limit-captured-frames 0
3) ethanalyzerキャプチャにdetailフラグを追加すると、クライアントとサーバ間の通信の詳細が表示されます。
Frame 14 (358 bytes on wire, 358 bytes captured) Arrival Time: Jul 19, 2023 21:53:29.339064000 [Time delta from previous captured frame: 0.096490000 seconds] [Time delta from previous displayed frame: 2.618117000 seconds] [Time since reference or first frame: 2.618117000 seconds] Frame Number: 14 Frame Length: 358 bytes Capture Length: 358 bytes [Frame is marked: False] [Protocols in frame: eth:vlan:ip:udp:bootp] Ethernet II, Src: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) Source: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Type: 802.1Q Virtual LAN (0x8100) 802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 10 000. .... .... .... = Priority: 0 ...0 .... .... .... = CFI: 0 .... 0000 0000 1010 = ID: 10 Type: IP (0x0800) Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255 (255.255.255.255) Version: 4 Header length: 20 bytes Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00) 0000 00.. = Differentiated Services Codepoint: Default (0x00) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 340 Identification: 0x0000 (0) Flags: 0x00 0.. = Reserved bit: Not Set .0. = Do not fragment: Not Set ..0 = More fragments: Not Set Fragment offset: 0 Time to live: 255 Protocol: UDP (0x11) Header checksum: 0xba99 [correct] [Good: True] [Bad : False] Source: 0.0.0.0 (0.0.0.0) Destination: 255.255.255.255 (255.255.255.255) User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67) Source port: bootpc (68) Destination port: bootps (67) Length: 320 Checksum: 0x2bbb [validation disabled] [Good Checksum: False] [Bad Checksum: False] Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0x64b14fa7 Seconds elapsed: 0 Bootp flags: 0x8000 (Broadcast) 1... .... .... .... = Broadcast flag: Broadcast .000 0000 0000 0000 = Reserved flags: 0x0000 Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 0.0.0.0 (0.0.0.0) Client MAC address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Client hardware address padding: 00000000000000000000 Server host name not given Boot file name not given Magic cookie: (OK) Option: (t=53,l=1) DHCP Message Type = DHCP Discover Option: (53) DHCP Message Type Length: 1 Value: 01 Option: (t=61,l=18) Client identifier Option: (61) Client identifier Length: 18 Value: 0046444F3230323431435548566C616E3130 Option: (t=51,l=4) IP Address Lease Time = 2 hours Option: (51) IP Address Lease Time Length: 4 Value: 00001C20 Option: (t=60,l=19) Vendor class identifier = "Cisco NXOS® N9K-C9372PX-E" Option: (60) Vendor class identifier Length: 19 Value: 436973636F204E394B2D433933373250582D45 Option: (t=43,l=8) Vendor-Specific Information Option: (43) Vendor-Specific Information Length: 8 Value: F1060062ECF304AC Option: (t=55,l=8) Parameter Request List Option: (55) Parameter Request List Length: 8 Value: 010306070C424396 1 = Subnet Mask 3 = Router 6 = Domain Name Server 7 = Log Server 12 = Host Name 66 = TFTP Server Name 67 = Bootfile name 150 = TFTP server address End Option Padding Frame 15 (354 bytes on wire, 354 bytes captured) Arrival Time: Jul 19, 2023 21:53:29.340263000 [Time delta from previous captured frame: 0.001199000 seconds] [Time delta from previous displayed frame: 0.001199000 seconds] [Time since reference or first frame: 2.619316000 seconds] Frame Number: 15 Frame Length: 354 bytes Capture Length: 354 bytes [Frame is marked: False] [Protocols in frame: eth:ip:udp:bootp] Ethernet II, Src: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57), Dst: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) Destination: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) Address: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Source: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) Address: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Type: IP (0x0800)
Frame 15 (354 bytes on wire, 354 bytes captured) Arrival Time: Jul 19, 2023 21:53:29.340263000 [Time delta from previous captured frame: 0.001199000 seconds] [Time delta from previous displayed frame: 0.001199000 seconds] [Time since reference or first frame: 2.619316000 seconds] Frame Number: 15 Frame Length: 354 bytes Capture Length: 354 bytes [Frame is marked: False] [Protocols in frame: eth:ip:udp:bootp] Ethernet II, Src: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57), Dst: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) Destination: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) Address: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Source: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) Address: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Type: IP (0x0800) Internet Protocol, Src: 192.168.10.1 (192.168.10.1), Dst: 192.168.1.2 (192.168.1.2) Version: 4 Header length: 20 bytes Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00) 0000 00.. = Differentiated Services Codepoint: Default (0x00) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 340 Identification: 0xefab (61355) Flags: 0x00 0.. = Reserved bit: Not Set .0. = Do not fragment: Not Set ..0 = More fragments: Not Set Fragment offset: 0 Time to live: 255 Protocol: UDP (0x11) Header checksum: 0x3e99 [correct] [Good: True] [Bad : False] Source: 192.168.10.1 (192.168.10.1) Destination: 192.168.1.2 (192.168.1.2) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67) Source port: bootps (67) Destination port: bootps (67) Length: 320 Checksum: 0xd4bc [validation disabled] [Good Checksum: False] [Bad Checksum: False] Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 1 Transaction ID: 0x64b14fa7 Seconds elapsed: 0 Bootp flags: 0x8000 (Broadcast) 1... .... .... .... = Broadcast flag: Broadcast .000 0000 0000 0000 = Reserved flags: 0x0000 Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 192.168.10.1 (192.168.10.1) Client MAC address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Client hardware address padding: 00000000000000000000 Server host name not given Boot file name not given Magic cookie: (OK) Option: (t=53,l=1) DHCP Message Type = DHCP Discover Option: (53) DHCP Message Type Length: 1 Value: 01 Option: (t=61,l=18) Client identifier Option: (61) Client identifier Length: 18 Value: 0046444F3230323431435548566C616E3130 Option: (t=51,l=4) IP Address Lease Time = 2 hours Option: (51) IP Address Lease Time Length: 4 Value: 00001C20 Option: (t=60,l=19) Vendor class identifier = "Cisco NXOS® N9K-C9372PX-E" Option: (60) Vendor class identifier Length: 19 Value: 436973636F204E394B2D433933373250582D45 Option: (t=43,l=8) Vendor-Specific Information Option: (43) Vendor-Specific Information Length: 8 Value: F1060062ECF304AC Option: (t=55,l=8) Parameter Request List Option: (55) Parameter Request List Length: 8 Value: 010306070C424396 1 = Subnet Mask 3 = Router 6 = Domain Name Server 7 = Log Server 12 = Host Name 66 = TFTP Server Name 67 = Bootfile name 150 = TFTP server address End Option Padding
Frame 27 (348 bytes on wire, 348 bytes captured) Arrival Time: Jul 19, 2023 21:53:31.340920000 [Time delta from previous captured frame: 0.097549000 seconds] [Time delta from previous displayed frame: 2.000657000 seconds] [Time since reference or first frame: 4.619973000 seconds] Frame Number: 27 Frame Length: 348 bytes Capture Length: 348 bytes [Frame is marked: False] [Protocols in frame: eth:ip:udp:bootp] Ethernet II, Src: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47), Dst: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) Destination: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) Address: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Source: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) Address: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Type: IP (0x0800) Internet Protocol, Src: 192.168.1.2 (192.168.1.2), Dst: 192.168.10.1 (192.168.10.1) Version: 4 Header length: 20 bytes Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00) 0000 00.. = Differentiated Services Codepoint: Default (0x00) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 334 Identification: 0x0014 (20) Flags: 0x00 0.. = Reserved bit: Not Set .0. = Do not fragment: Not Set ..0 = More fragments: Not Set Fragment offset: 0 Time to live: 254 Protocol: UDP (0x11) Header checksum: 0x2f37 [correct] [Good: True] [Bad : False] Source: 192.168.1.2 (192.168.1.2) Destination: 192.168.10.1 (192.168.10.1) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67) Source port: bootps (67) Destination port: bootps (67) Length: 314 Checksum: 0x0500 [validation disabled] [Good Checksum: False] [Bad Checksum: False] Bootstrap Protocol Message type: Boot Reply (2) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0x64b14fa7 Seconds elapsed: 0 Bootp flags: 0x8000 (Broadcast) 1... .... .... .... = Broadcast flag: Broadcast .000 0000 0000 0000 = Reserved flags: 0x0000 Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 192.168.10.19 (192.168.10.19) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 192.168.10.1 (192.168.10.1) Client MAC address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Client hardware address padding: 00000000000000000000 Server host name not given Boot file name not given Magic cookie: (OK) Option: (t=53,l=1) DHCP Message Type = DHCP Offer Option: (53) DHCP Message Type Length: 1 Value: 02 Option: (t=61,l=18) Client identifier Option: (61) Client identifier Length: 18 Value: 0046444F3230323431435548566C616E3130 Option: (t=54,l=4) DHCP Server Identifier = 192.168.1.2 Option: (54) DHCP Server Identifier Length: 4 Value: C0A80102 Option: (t=51,l=4) IP Address Lease Time = 1 day Option: (51) IP Address Lease Time Length: 4 Value: 00015180 Option: (t=58,l=4) Renewal Time Value = 12 hours Option: (58) Renewal Time Value Length: 4 Value: 0000A8C0 Option: (t=59,l=4) Rebinding Time Value = 21 hours Option: (59) Rebinding Time Value Length: 4 Value: 00012750 Option: (t=1,l=4) Subnet Mask = 255.255.255.0 Option: (1) Subnet Mask Length: 4 Value: FFFFFF00 Option: (t=3,l=4) Router = 192.168.1.2 Option: (3) Router Length: 4 Value: C0A80102 Option: (t=6,l=4) Domain Name Server = 8.8.8.8 Option: (6) Domain Name Server Length: 4 Value: 08080808 End Option
Frame 28 (348 bytes on wire, 348 bytes captured) Arrival Time: Jul 19, 2023 21:53:31.341325000 [Time delta from previous captured frame: 0.000405000 seconds] [Time delta from previous displayed frame: 0.000405000 seconds] [Time since reference or first frame: 4.620378000 seconds] Frame Number: 28 Frame Length: 348 bytes Capture Length: 348 bytes [Frame is marked: False] [Protocols in frame: eth:ip:udp:bootp] Ethernet II, Src: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) Source: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) Address: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Type: IP (0x0800) Internet Protocol, Src: 192.168.10.1 (192.168.10.1), Dst: 255.255.255.255 (255.255.255.255) Version: 4 Header length: 20 bytes Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00) 0000 00.. = Differentiated Services Codepoint: Default (0x00) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 334 Identification: 0x1400 (5120) Flags: 0x00 0.. = Reserved bit: Not Set .0. = Do not fragment: Not Set ..0 = More fragments: Not Set Fragment offset: 0 Time to live: 255 Protocol: UDP (0x11) Header checksum: 0xdbf5 [correct] [Good: True] [Bad : False] Source: 192.168.10.1 (192.168.10.1) Destination: 255.255.255.255 (255.255.255.255) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68) Source port: bootps (67) Destination port: bootpc (68) Length: 314 Checksum: 0xc6a8 [validation disabled] [Good Checksum: False] [Bad Checksum: False] Bootstrap Protocol Message type: Boot Reply (2) Hardware type: Ethernet Hardware address length: 6 Hops: 1 Transaction ID: 0x64b14fa7 Seconds elapsed: 0 Bootp flags: 0x8000 (Broadcast) 1... .... .... .... = Broadcast flag: Broadcast .000 0000 0000 0000 = Reserved flags: 0x0000 Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 192.168.10.19 (192.168.10.19) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 192.168.10.1 (192.168.10.1) Client MAC address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Client hardware address padding: 00000000000000000000 Server host name not given Boot file name not given Magic cookie: (OK) Option: (t=53,l=1) DHCP Message Type = DHCP Offer Option: (53) DHCP Message Type Length: 1 Value: 02 Option: (t=61,l=18) Client identifier Option: (61) Client identifier Length: 18 Value: 0046444F3230323431435548566C616E3130 Option: (t=54,l=4) DHCP Server Identifier = 192.168.1.2 Option: (54) DHCP Server Identifier Length: 4 Value: C0A80102 Option: (t=51,l=4) IP Address Lease Time = 1 day Option: (51) IP Address Lease Time Length: 4 Value: 00015180 Option: (t=58,l=4) Renewal Time Value = 12 hours Option: (58) Renewal Time Value Length: 4 Value: 0000A8C0 Option: (t=59,l=4) Rebinding Time Value = 21 hours Option: (59) Rebinding Time Value Length: 4 Value: 00012750 Option: (t=1,l=4) Subnet Mask = 255.255.255.0 Option: (1) Subnet Mask Length: 4 Value: FFFFFF00 Option: (t=3,l=4) Router = 192.168.1.2 Option: (3) Router Length: 4 Value: C0A80102 Option: (t=6,l=4) Domain Name Server = 8.8.8.8 Option: (6) Domain Name Server Length: 4 Value: 08080808 End Option
Frame 47 (370 bytes on wire, 370 bytes captured) Arrival Time: Jul 19, 2023 21:53:35.342380000 [Time delta from previous captured frame: 0.097649000 seconds] [Time delta from previous displayed frame: 4.001055000 seconds] [Time since reference or first frame: 8.621433000 seconds] Frame Number: 47 Frame Length: 370 bytes Capture Length: 370 bytes [Frame is marked: False] [Protocols in frame: eth:vlan:ip:udp:bootp] Ethernet II, Src: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff) .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast) .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default) Source: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Type: 802.1Q Virtual LAN (0x8100) 802.1Q Virtual LAN, PRI: 0, CFI: 0, ID: 10 000. .... .... .... = Priority: 0 ...0 .... .... .... = CFI: 0 .... 0000 0000 1010 = ID: 10 Type: IP (0x0800) Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255 (255.255.255.255) Version: 4 Header length: 20 bytes Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00) 0000 00.. = Differentiated Services Codepoint: Default (0x00) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 352 Identification: 0x0000 (0) Flags: 0x00 0.. = Reserved bit: Not Set .0. = Do not fragment: Not Set ..0 = More fragments: Not Set Fragment offset: 0 Time to live: 255 Protocol: UDP (0x11) Header checksum: 0xba8d [correct] [Good: True] [Bad : False] Source: 0.0.0.0 (0.0.0.0) Destination: 255.255.255.255 (255.255.255.255) User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67) Source port: bootpc (68) Destination port: bootps (67) Length: 332 Checksum: 0xbaae [validation disabled] [Good Checksum: False] [Bad Checksum: False] Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0x64b14fa7 Seconds elapsed: 0 Bootp flags: 0x8000 (Broadcast) 1... .... .... .... = Broadcast flag: Broadcast .000 0000 0000 0000 = Reserved flags: 0x0000 Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 0.0.0.0 (0.0.0.0) Client MAC address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Client hardware address padding: 00000000000000000000 Server host name not given Boot file name not given Magic cookie: (OK) Option: (t=53,l=1) DHCP Message Type = DHCP Request Option: (53) DHCP Message Type Length: 1 Value: 03 Option: (t=61,l=18) Client identifier Option: (61) Client identifier Length: 18 Value: 0046444F3230323431435548566C616E3130 Option: (t=50,l=4) Requested IP Address = 192.168.10.19 Option: (50) Requested IP Address Length: 4 Value: C0A80A13 Option: (t=51,l=4) IP Address Lease Time = 2 hours Option: (51) IP Address Lease Time Length: 4 Value: 00001C20 Option: (t=54,l=4) DHCP Server Identifier = 192.168.1.2 Option: (54) DHCP Server Identifier Length: 4 Value: C0A80102 Option: (t=60,l=19) Vendor class identifier = "Cisco NXOS® N9K-C9372PX-E" Option: (60) Vendor class identifier Length: 19 Value: 436973636F204E394B2D433933373250582D45 Option: (t=43,l=8) Vendor-Specific Information Option: (43) Vendor-Specific Information Length: 8 Value: F1060062ECF304AC Option: (t=55,l=8) Parameter Request List Option: (55) Parameter Request List Length: 8 Value: 010306070C424396 1 = Subnet Mask 3 = Router 6 = Domain Name Server 7 = Log Server 12 = Host Name 66 = TFTP Server Name 67 = Bootfile name 150 = TFTP server address End Option Padding
Frame 48 (366 bytes on wire, 366 bytes captured) Arrival Time: Jul 19, 2023 21:53:35.343718000 [Time delta from previous captured frame: 0.001338000 seconds] [Time delta from previous displayed frame: 0.001338000 seconds] [Time since reference or first frame: 8.622771000 seconds] Frame Number: 48 Frame Length: 366 bytes Capture Length: 366 bytes [Frame is marked: False] [Protocols in frame: eth:ip:udp:bootp] Ethernet II, Src: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57), Dst: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) Destination: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) Address: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Source: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) Address: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Type: IP (0x0800) Internet Protocol, Src: 192.168.10.1 (192.168.10.1), Dst: 192.168.1.2 (192.168.1.2) Version: 4 Header length: 20 bytes Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00) 0000 00.. = Differentiated Services Codepoint: Default (0x00) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 352 Identification: 0xefac (61356) Flags: 0x00 0.. = Reserved bit: Not Set .0. = Do not fragment: Not Set ..0 = More fragments: Not Set Fragment offset: 0 Time to live: 255 Protocol: UDP (0x11) Header checksum: 0x3e8c [correct] [Good: True] [Bad : False] Source: 192.168.10.1 (192.168.10.1) Destination: 192.168.1.2 (192.168.1.2) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67) Source port: bootps (67) Destination port: bootps (67) Length: 332 Checksum: 0x63b0 [validation disabled] [Good Checksum: False] [Bad Checksum: False] Bootstrap Protocol Message type: Boot Request (1) Hardware type: Ethernet Hardware address length: 6 Hops: 1 Transaction ID: 0x64b14fa7 Seconds elapsed: 0 Bootp flags: 0x8000 (Broadcast) 1... .... .... .... = Broadcast flag: Broadcast .000 0000 0000 0000 = Reserved flags: 0x0000 Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 0.0.0.0 (0.0.0.0) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 192.168.10.1 (192.168.10.1) Client MAC address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Client hardware address padding: 00000000000000000000 Server host name not given Boot file name not given Magic cookie: (OK) Option: (t=53,l=1) DHCP Message Type = DHCP Request Option: (53) DHCP Message Type Length: 1 Value: 03 Option: (t=61,l=18) Client identifier Option: (61) Client identifier Length: 18 Value: 0046444F3230323431435548566C616E3130 Option: (t=50,l=4) Requested IP Address = 192.168.10.19 Option: (50) Requested IP Address Length: 4 Value: C0A80A13 Option: (t=51,l=4) IP Address Lease Time = 2 hours Option: (51) IP Address Lease Time Length: 4 Value: 00001C20 Option: (t=54,l=4) DHCP Server Identifier = 192.168.1.2 Option: (54) DHCP Server Identifier Length: 4 Value: C0A80102 Option: (t=60,l=19) Vendor class identifier = "Cisco N9K-C9372PX-E" Option: (60) Vendor class identifier Length: 19 Value: 436973636F204E394B2D433933373250582D45 Option: (t=43,l=8) Vendor-Specific Information Option: (43) Vendor-Specific Information Length: 8 Value: F1060062ECF304AC Option: (t=55,l=8) Parameter Request List Option: (55) Parameter Request List Length: 8 Value: 010306070C424396 1 = Subnet Mask 3 = Router 6 = Domain Name Server 7 = Log Server 12 = Host Name 66 = TFTP Server Name 67 = Bootfile name 150 = TFTP server address End Option Padding
Frame 49 (348 bytes on wire, 348 bytes captured) Arrival Time: Jul 19, 2023 21:53:35.344310000 [Time delta from previous captured frame: 0.000592000 seconds] [Time delta from previous displayed frame: 0.000592000 seconds] [Time since reference or first frame: 8.623363000 seconds] Frame Number: 49 Frame Length: 348 bytes Capture Length: 348 bytes [Frame is marked: False] [Protocols in frame: eth:ip:udp:bootp] Ethernet II, Src: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47), Dst: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) Destination: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) Address: 6c:31:0e:a3:0c:57 (6c:31:0e:a3:0c:57) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Source: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) Address: c4:c6:03:09:cf:47 (c4:c6:03:09:cf:47) .... ...0 .... .... .... .... = IG bit: Individual address (unicast) .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default) Type: IP (0x0800) Internet Protocol, Src: 192.168.1.2 (192.168.1.2), Dst: 192.168.10.1 (192.168.10.1) Version: 4 Header length: 20 bytes Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00) 0000 00.. = Differentiated Services Codepoint: Default (0x00) .... ..0. = ECN-Capable Transport (ECT): 0 .... ...0 = ECN-CE: 0 Total Length: 334 Identification: 0x0015 (21) Flags: 0x00 0.. = Reserved bit: Not Set .0. = Do not fragment: Not Set ..0 = More fragments: Not Set Fragment offset: 0 Time to live: 254 Protocol: UDP (0x11) Header checksum: 0x2f36 [correct] [Good: True] [Bad : False] Source: 192.168.1.2 (192.168.1.2) Destination: 192.168.10.1 (192.168.10.1) User Datagram Protocol, Src Port: bootps (67), Dst Port: bootps (67) Source port: bootps (67) Destination port: bootps (67) Length: 314 Checksum: 0x0200 [validation disabled] [Good Checksum: False] [Bad Checksum: False] Bootstrap Protocol Message type: Boot Reply (2) Hardware type: Ethernet Hardware address length: 6 Hops: 0 Transaction ID: 0x64b14fa7 Seconds elapsed: 0 Bootp flags: 0x8000 (Broadcast) 1... .... .... .... = Broadcast flag: Broadcast .000 0000 0000 0000 = Reserved flags: 0x0000 Client IP address: 0.0.0.0 (0.0.0.0) Your (client) IP address: 192.168.10.19 (192.168.10.19) Next server IP address: 0.0.0.0 (0.0.0.0) Relay agent IP address: 192.168.10.1 (192.168.10.1) Client MAC address: 00:62:ec:f3:04:b3 (00:62:ec:f3:04:b3) Client hardware address padding: 00000000000000000000 Server host name not given Boot file name not given Magic cookie: (OK) Option: (t=53,l=1) DHCP Message Type = DHCP ACK Option: (53) DHCP Message Type Length: 1 Value: 05 Option: (t=61,l=18) Client identifier Option: (61) Client identifier Length: 18 Value: 0046444F3230323431435548566C616E3130 Option: (t=54,l=4) DHCP Server Identifier = 192.168.1.2 Option: (54) DHCP Server Identifier Length: 4 Value: C0A80102 Option: (t=51,l=4) IP Address Lease Time = 1 day Option: (51) IP Address Lease Time Length: 4 Value: 00015180 Option: (t=58,l=4) Renewal Time Value = 12 hours Option: (58) Renewal Time Value Length: 4 Value: 0000A8C0 Option: (t=59,l=4) Rebinding Time Value = 21 hours Option: (59) Rebinding Time Value Length: 4 Value: 00012750 Option: (t=1,l=4) Subnet Mask = 255.255.255.0 Option: (1) Subnet Mask Length: 4 Value: FFFFFF00 Option: (t=3,l=4) Router = 192.168.1.2 Option: (3) Router Length: 4 Value: C0A80102 Option: (t=6,l=4) Domain Name Server = 8.8.8.8 Option: (6) Domain Name Server Length: 4 Value: 08080808 End Option
Client# show interface vlan 10 Vlan10 is up, line protocol is up, autostate enabled Hardware is EtherSVI, address is 0062.ecf3.04b3 Internet Address is 192.168.10.19/24 <<<<<<< It is using the IP address MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive not supported ARP type: ARPA Last clearing of "show interface" counters never L3 in Switched: ucast: 0 pkts, 0 bytes Client#
改定 | 発行日 | コメント |
---|---|---|
1.0 |
24-Jul-2023 |
初版 |