مثال تكوين MP-EBGP

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

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

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

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 192.168.100.11

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

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

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.

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.