Cisco Router IOS XR Manuale Utente Scaricare il pdf (Pagina 90)

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C 10.1.13.0/24 is directly connected, FastEthernet0/0

C 10.3.3.3/32 is directly connected, Loopback0

CE1#

We only see our local routes, nothing from CE2 yet. This is because we have

not built the VPNv4 session between PE1 and PE2 yet. We need to configure

BGP VPNv4 in order to get the two PE routers to pass the tagged routes to

each other. So, onto BGP we go!

For this we will peer with PE2 loopback (150.2.2.2) using AS 1.

PE1 first:

RP/0/RSP0/CPU0:R1#conf t

Fri Apr 20 02:21:32.174 UTC

First we define our BGP process and AS number

RP/0/RSP0/CPU0:R1(config)#router /jointfilesconvert/356165/bgp 1

Enable vpv4 address family

RP/0/RSP0/CPU0:R1(config)#address-family vpnv4 unicast

Now we can configure our neighbor and all the info.

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-af)# neighbor 150.2.2.2

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-nbr)# remote-as 1

Remember to specify the loopback as the update-source

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-nbr)# update-source Loopback0

Now we can enable VPNv4 address family with that neighbor

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-nbr)# address-family vpnv4 unicast

Now we can configure the VRF parameters that BGP needs to know

First define our VRF

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-nbr-af)# vrf R3R4

Assign our Route Distinguisher (RD)

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-vrf)# rd 100:100

Enable IPv4 Unicse for this VRF

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-vrf)# address-family ipv4 unicast

And finally redistribute our OSPF learned routes into BGP VRF R3R4

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-vrf-af)# redistribute ospf R3R4 match internal

external

RP/0/RSP0/CPU0:R1(config-/jointfilesconvert/356165/bgp-vrf-af)# ^Z

Uncommitted changes found, commit them before exiting(yes/no/cancel)?

[cancel]:yes

RP/0/RSP0/CPU0:R1#

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Cisco Router IOS XR Manuale Utente Pagina 90