測試VxLAN中虛擬通道端點之間的網狀架構連線

已更新: 2023 年 8 月 1 日

文件 ID:220694

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簡介

本檔案介紹如何在虛擬可擴充區域網路(VxLAN)中的兩個虛擬通道端點(VTEP)之間測試網狀架構連線。

必要條件

需求

思科建議您瞭解以下主題：

Nexus NX-OS軟體
邊界閘道通訊協定(BGP)
VxLAN

採用元件

本檔案中的資訊是根據搭載NXOS版本10.3(3)的Cisco Nexus N9K-C93180YC-EX。

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路運作中，請確保您瞭解任何指令可能造成的影響。

設定

一旦VxLAN被設定，使用者通常希望測試它是否能按預期工作。雖然建議的方法是在連線到不同VTEP的兩個終端主機之間執行Ping測試，但也可以使用VTEP上的環回介面測試交換矩陣連線。

註：使用交換機虛擬介面(SVI)作為ping測試的源或目標不是有效的交換矩陣連線測試。原因是由於任播網關功能，我們在交換矩陣SVI上擁有相同的IP。

網路圖表

Topology

組態

在此VxLAN部署中，Nexus N9K-2配置為SPINE，而N9K-1和N9K-2都配置為VTEP。

第3層是擴充的，因此每個虛擬路由和轉送(VRF)在兩個VTEP上都有第3層虛擬網路介面(VNI)。

為VRF evpn_a配置的第3層VNI為50100。

N9K-1

步驟1.我們將環回配置為要測試的VRF的一部分。

N9K-1(config)# interface loopback50
N9K-1(config-if)# vrf member evpn_a
Message reported by command ::                 vrf member evpn_a
Warning: Deleted all L3 config on interface loopback50
N9K-1(config-if)# ip address 10.255.255.1/32

步驟2.我們將環回通告到交換矩陣中。否則，即使ICMP請求到達目的地，目的地本身仍無法傳回ICMP回覆。

N9K-1(config)# router bgp 65522
N9K-1(config-router)# vrf evpn_a
N9K-1(config-router-vrf)# address-family ipv4 unicast 
N9K-1(config-router-vrf-af)# network 10.255.255.1/32

N9K-2

步驟1.我們將環回配置為要測試的VRF的一部分。

N9K-2(config)# interface loopback50
N9K-2(config-if)# vrf member evpn_a
Message reported by command ::                 vrf member evpn_a
Warning: Deleted all L3 config on interface loopback50
N9K-2(config-if)# ip address 10.255.255.2/32

步驟2.我們將環回通告到交換矩陣中。否則，即使ICMP請求到達目的地，目的地本身仍無法傳回ICMP回覆。

N9K-2(config)# router bgp 65522
N9K-2(config-router)# vrf evpn_a
N9K-2(config-router-vrf)# address-family ipv4 unicast 
N9K-2(config-router-vrf-af)# network 10.255.255.2/32

驗證

步驟1.確認地址系列IPv4單播的本機BGP表中存在環回。

N9K-1# show ip bgp 10.255.255.1/32 vrf evpn_a
BGP routing table information for VRF evpn_a, address family IPv4 Unicast
BGP routing table entry for 10.255.255.1/32, version 732
Paths: (1 available, best #1)
Flags: (0x80c0002) (high32 0x000020) on xmit-list, is not in urib, exported
  vpn: version 1053, (0x00000000100002) on xmit-list
Multipath: eBGP iBGP

  Advertised path-id 1, VPN AF advertised path-id 1
  Path type: local, path is valid, is best path, no labeled nexthop, is extd
  AS-Path: NONE, path locally originated
    0.0.0.0 (metric 0) from 0.0.0.0 (10.2.254.100)
      Origin IGP, MED not set, localpref 100, weight 32768
      Extcommunity: RT:65522:50100

  VRF advertise information:
  Path-id 1 not advertised to any peer

  VPN AF advertise information:
  Path-id 1 not advertised to any peer

N9K-2# show ip bgp 10.255.255.2/32 vrf evpn_a
BGP routing table information for VRF evpn_a, address family IPv4 Unicast
BGP routing table entry for 10.255.255.2/32, version 241
Paths: (1 available, best #1)
Flags: (0x80c0002) (high32 0x000020) on xmit-list, is not in urib, exported
  vpn: version 417, (0x00000000100002) on xmit-list
Multipath: eBGP iBGP

  Advertised path-id 1, VPN AF advertised path-id 1
  Path type: local, path is valid, is best path, no labeled nexthop, is extd
  AS-Path: NONE, path locally originated
    0.0.0.0 (metric 0) from 0.0.0.0 (10.2.254.100)
      Origin IGP, MED not set, localpref 100, weight 32768
      Extcommunity: RT:65522:50100

  VRF advertise information:
  Path-id 1 not advertised to any peer

  VPN AF advertise information:
  Path-id 1 not advertised to any peer

步驟2.確認環回存在於地址系列L2VPN EVPN的本地BGP表中，並且會通告給預期的網路虛擬介面(NVE)對等體。

N9K-1# show bgp l2vpn evpn 10.255.255.1 vrf evpn_a
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 10.2.0.49:4    (L3VNI 50100)
BGP routing table entry for [5]:[0]:[0]:[32]:[10.255.255.1]/224, version 36993
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn

  Advertised path-id 1
  Path type: local, path is valid, is best path, no labeled nexthop
  Gateway IP: 0.0.0.0
  AS-Path: NONE, path locally originated
    10.2.1.49 (metric 0) from 0.0.0.0 (10.2.0.49)
      Origin IGP, MED not set, localpref 100, weight 32768
      Received label 50100
      Extcommunity: RT:65522:50100 ENCAP:8 Router MAC:a0e0.af67.511d

  Path-id 1 advertised to peers:
    10.2.0.33          10.2.0.34      

N9K-2# 
LEAF48# show bgp l2vpn evpn 10.255.255.2 vrf evpn_a
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 10.2.0.48:4    (L3VNI 50100)
BGP routing table entry for [5]:[0]:[0]:[32]:[10.255.255.2]/224, version 13373
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn

  Advertised path-id 1
  Path type: local, path is valid, is best path, no labeled nexthop
  Gateway IP: 0.0.0.0
  AS-Path: NONE, path locally originated
    10.2.1.48 (metric 0) from 0.0.0.0 (10.2.0.48)
      Origin IGP, MED not set, localpref 100, weight 32768
      Received label 50100
      Extcommunity: RT:65522:50100 ENCAP:8 Router MAC:6cb2.aeee.5a97

  Path-id 1 advertised to peers:
    10.2.0.33          10.2.0.34

步驟3.確認已從遠端NVE對等體收到更新。

N9K-1# show bgp l2vpn evpn 10.255.255.2 vrf evpn_a
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 10.2.0.49:4    (L3VNI 50100)
BGP routing table entry for [5]:[0]:[0]:[32]:[10.255.255.2]/224, version 36995
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn, is not in HW

  Advertised path-id 1
  Path type: internal, path is valid, is best path, no labeled nexthop
             Imported from 10.2.0.48:4:[5]:[0]:[0]:[32]:[10.255.255.2]/224 
  Gateway IP: 0.0.0.0
  AS-Path: NONE, path sourced internal to AS
    10.2.1.48 (metric 6) from 10.2.0.33 (10.2.0.33)
      Origin IGP, MED not set, localpref 100, weight 0
      Received label 50100
      Extcommunity: RT:65522:50100 Route-Import:10.2.1.147:3100 Source AS:65522:0
          ENCAP:8 Router MAC:6cb2.aeee.5a97
      Originator: 10.2.0.48 Cluster list: 0.0.255.242 

  Path-id 1 not advertised to any peer

N9K-2# show bgp l2vpn evpn 10.255.255.1 vrf evpn_a
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 10.2.0.48:4    (L3VNI 50100)
BGP routing table entry for [5]:[0]:[0]:[32]:[10.255.255.1]/224, version 13372
Paths: (1 available, best #1)
Flags: (0x000002) (high32 00000000) on xmit-list, is not in l2rib/evpn, is not in HW

  Advertised path-id 1
  Path type: internal, path is valid, is best path, no labeled nexthop
             Imported from 10.2.0.49:4:[5]:[0]:[0]:[32]:[10.255.255.1]/224 
  Gateway IP: 0.0.0.0
  AS-Path: NONE, path sourced internal to AS
    10.2.1.49 (metric 6) from 10.2.0.33 (10.2.0.33)
      Origin IGP, MED not set, localpref 100, weight 0
      Received label 50100
      Extcommunity: RT:65522:50100 Route-Import:10.2.1.49:3100 Source AS:65522:0
          ENCAP:8 Router MAC:a0e0.af67.511d
      Originator: 10.2.0.49 Cluster list: 0.0.255.242 

  Path-id 1 not advertised to any peer

步驟4.確認路由表中存在遠端環迴路由，下一跳是預期的NVE對等路由器。

N9K-1# show ip route 10.255.255.2 vrf evpn_a
IP Route Table for VRF "evpn_a"
'*' denotes best ucast next-hop
'**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric]
'%
    
    
      ' in via output denotes VRF 
     
       10.255.255.2/32, ubest/mbest: 1/0 *via 10.2.1.48%default, [200/0], 00:12:39, bgp-65522, internal, tag 65522, segid: 50100 tunnelid: 0xa020130 encap: VXLAN N9K-2# show ip route 10.255.255.1 vrf evpn_a IP Route Table for VRF "evpn_a" '*' denotes best ucast next-hop '**' denotes best mcast next-hop '[x/y]' denotes [preference/metric] '% 
      
        ' in via output denotes VRF 
       
         10.255.255.1/32, ubest/mbest: 1/0 *via 10.2.1.49%default, [200/0], 00:15:36, bgp-65522, internal, tag 65522, segid: 50100 tunnelid: 0xa020131 encap: VXLAN

步驟5.將ICMP請求傳送到遠端環回，使用本地環回作為源。

N9K-1# ping 10.255.255.2 source-interface loopback 50
PING 10.255.255.2 (10.255.255.2): 56 data bytes
64 bytes from 10.255.255.2: icmp_seq=0 ttl=254 time=2.009 ms
64 bytes from 10.255.255.2: icmp_seq=1 ttl=254 time=1.26 ms
64 bytes from 10.255.255.2: icmp_seq=2 ttl=254 time=1.231 ms
64 bytes from 10.255.255.2: icmp_seq=3 ttl=254 time=1.142 ms
64 bytes from 10.255.255.2: icmp_seq=4 ttl=254 time=1.127 ms

--- 10.255.255.2 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 1.127/1.353/2.009 ms


N9K-2# ping 10.255.255.1 source-interface loopback 50
PING 10.255.255.1 (10.255.255.1): 56 data bytes
64 bytes from 10.255.255.1: icmp_seq=0 ttl=254 time=1.47 ms
64 bytes from 10.255.255.1: icmp_seq=1 ttl=254 time=1.396 ms
64 bytes from 10.255.255.1: icmp_seq=2 ttl=254 time=1.327 ms
64 bytes from 10.255.255.1: icmp_seq=3 ttl=254 time=1.451 ms
64 bytes from 10.255.255.1: icmp_seq=4 ttl=254 time=1.366 ms

--- 10.255.255.1 ping statistics ---
5 packets transmitted, 5 packets received, 0.00% packet loss
round-trip min/avg/max = 1.327/1.402/1.47 ms

測試VxLAN中虛擬通道端點之間的網狀架構連線

無偏見用語

關於此翻譯

目錄

簡介

必要條件

需求

採用元件

設定

網路圖表

組態

N9K-1

N9K-2

驗證

相關資訊

修訂記錄

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