Dit document geeft informatie over de manier waarop u multiprotocol Extended Border Gateway Protocol (MP-EBGP) in Cisco IOS-routers kunt configureren. MP-BGP is een uitgebreide BGP die BGP toestaat om routing informatie voor meerdere netwerklaagprotocollen IPv6, VPNv4 en anderen te dragen. MP-BGP staat u toe om een unicast te hebben die topologie van een multicast routingtopologie verschilt, die helpt om het netwerk en de middelen te controleren.
Er zijn geen specifieke vereisten van toepassing op dit document.
Dit document is niet beperkt tot specifieke software- en hardware-versies.
De configuraties in dit document zijn gebaseerd op Cisco 3700 Series router die Cisco IOS® softwarerelease 12.4(15)T 13 draait.
In dit voorbeeld worden de R1- en R3-routers geconfigureerd om in AS 5500 te zijn, wat iBGP vormt. De R2 router is ingesteld om in AS 6500 te zijn. De R1- en R2-routers communiceren met elkaar via MP-EBGP. Alle routers worden ingesteld met loopback-adressen.
N.B.: Gebruik het Opdrachtupgereedschap (alleen geregistreerde klanten) om meer informatie te vinden over de opdrachten die in dit document worden gebruikt.
Het netwerk in dit document is als volgt opgebouwd:
Dit document gebruikt deze configuraties:
Configuratie van router R1 |
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R1#show run Building configuration... ! version 12.4 ! hostname R1 ! ip cef ! ! interface Loopback0 ip address 10.10.10.10 255.255.255.0 ! interface FastEthernet0/0 ip address 192.168.100.10 255.255.255.0 duplex auto speed auto ! interface Serial0/0 ip address 172.16.10.1 255.255.255.0 mpls ip clock rate 2000000 ! router bgp 5500 no synchronization bgp router-id 10.10.10.10 bgp log-neighbor-changes network 192.168.100.0 redistribute connected neighbor 172.16.10.2 remote-as 6500 neighbor 172.16.10.2 soft-reconfiguration inbound neighbor 192.168.100.11 remote-as 5500 no auto-summary ! address-family vpnv4 neighbor 172.16.10.2 activate neighbor 172.16.10.2 send-community both !--- Sends the community attribute to a BGP neighbor. exit-address-family ! ! end |
Configuratie van router R2 |
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R2#show run Building configuration... ! version 12.4 ! hostname R2 ! ip cef ! ip vrf WAN rd 2020:1 route-target export 2020:1 route-target import 2020:1 ! ! interface Loopback0 ip vrf forwarding WAN !--- Associates a VRF instance with an interface or subinterface. ip address 20.20.20.20 255.255.255.255 ! interface Serial0/0 ip vrf forwarding WAN ip address 172.16.10.2 255.255.255.0 mpls ip clock rate 2000000 ! router bgp 6500 no synchronization bgp router-id 20.20.20.20 bgp log-neighbor-changes neighbor 172.16.10.1 remote-as 5500 no auto-summary ! ! address-family vpnv4 neighbor 172.16.10.1 activate neighbor 172.16.10.1 send-community both exit-address-family ! address-family ipv4 vrf WAN redistribute connected redistribute static neighbor 172.16.10.1 remote-as 5500 neighbor 172.16.10.1 activate no synchronization exit-address-family ! ! ! end |
Configuratie van router R3 |
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R3#show run Building configuration... ! version 12.4 ! hostname R3 ! ip cef ! ! ! interface Loopback0 ip address 11.11.11.11 255.255.255.255 ! interface FastEthernet0/0 ip address 192.168.100.11 255.255.255.0 duplex auto speed auto ! router bgp 5500 no synchronization bgp router-id 11.11.11.11 bgp log-neighbor-changes neighbor 192.168.100.10 remote-as 5500 no auto-summary ! end |
Om ingangen in de (BGP) routingtabel weer te geven, gebruikt u de opdracht ip bgp tonen.
ip-bgp tonen |
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In router R1 R1#show ip bgp 172.16.10.2 BGP routing table entry for 172.16.10.2/32, version 14 Paths: (1 available, best #1, table Default-IP-Routing-Table) Advertised to update-groups: 1 2 Local 0.0.0.0 from 0.0.0.0 (10.10.10.10) Origin incomplete, metric 0, localpref 100, weight 32768, valid, sourced, best !--- Displays the routing table entries for the host 172.16.10.2 R1#sh ip bgp 192.168.100.11 BGP routing table entry for 192.168.100.0/24, version 4 Paths: (1 available, best #1, table Default-IP-Routing-Table) Advertised to update-groups: 1 2 Local 0.0.0.0 from 0.0.0.0 (10.10.10.10) Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local, best !--- Displays the entries for the host 192.168.100.11In router R3 R3#sh ip bgp 192.168.100.10 BGP routing table entry for 192.168.100.0/24, version 4 Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17)) Not advertised to any peer Local 192.168.100.10 from 192.168.100.10 (10.10.10.10) Origin IGP, metric 0, localpref 100, valid, internal, best !--- Displays the entries for the host 192.168.100.10 |
In router R2, gebruik de show ip bgp vpnv4 opdracht om (VPNv4) adresinformatie van de (BGP) tabel weer te geven.
ip bgp vpnv4 tonen |
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In router R2 R2#sh ip bgp vpnv4 vrf WAN BGP table version is 24, local router ID is 20.20.20.20 Status codes: s suppressed, d damped, h history, * valid, > best, I - internal, r RIB-failure, S Stale Origin codes: I - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 2020:1 (default for vrf WAN) *> 10.10.10.0/24 172.16.10.1 0 0 5500 ? *> 20.20.20.20/32 0.0.0.0 0 32768 ? * 172.16.10.0/24 172.16.10.1 0 0 5500 ? *> 0.0.0.0 0 32768 ? r> 172.16.10.2/32 172.16.10.1 0 0 5500 ? *> 192.168.100.0 172.16.10.1 0 0 5500 I !--- Displays prefixes associated with the (VRF) instance WAN. R2#show ip bgp vpnv4 vrf WAN 172.16.10.1 BGP routing table entry for 2020:1:172.16.10.0/24, version 7 Paths: (2 available, best #2, table WAN) Advertised to update-groups: 1 5500 172.16.10.1 from 172.16.10.1 (10.10.10.10) Origin incomplete, metric 0, localpref 100, valid, external Extended Community: RT:2020:1 mpls labels in/out 18/nolabel Local 0.0.0.0 from 0.0.0.0 (20.20.20.20) Origin incomplete, metric 0, localpref 100, weight 32768, valid, sourced, best Extended Community: RT:2020:1 mpls labels in/out 18/aggregate(WAN) !--- Displays prefixes associated with neighbor 172.16.10.1 |
MP-EBGP wordt ingesteld tussen de R1- en R2-routers. Gebruik de ping opdracht om de bereikbaarheid van R1 tot R2 te verifiëren en vice versa.
pingelen |
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In router R1 R1#ping 172.16.10.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.10.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 12/64/208 ms R1#ping 192.168.100.11 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.100.11, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 12/41/96 ms !--- Router R1 can successfully ping the routers R2 and R3.In router R2 R2#ping vrf WAN 172.16.10.1 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 172.16.10.1, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 4/32/96 ms R2#ping vrf WAN 192.168.100.11 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 192.168.100.11, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 32/73/204 ms !--- Router R2 can successfully reach router R1 and R3. |
Revisie | Publicatiedatum | Opmerkingen |
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1.0 |
23-May-2012 |
Eerste vrijgave |