Lab 4: Configuring BGP within Service Provider
Lab 4: Configuring BGP within Service Provider
Task 1: Verify Pre-Configuration as mentioned below.
The following configuration needs to be verified
- IP addressing for all nodes including Physical and Software Interfaces.
| Device | Hostname | Operating system | Interface | IP Address & Mask |
|---|---|---|---|---|
| Provider Edge 1 | PE1 | IOS | Ethernet 0/2 | 10.0.23.2/24 |
| Loopback 1 | 2.2.2.2/32 | |||
| Provider 1 | P1 | IOS-XR | GigabitEthernet 0/0/0/2 | 10.0.23.3/24 |
| GigabitEthernet 0/0/0/3 | 10.0.34.3/24 | |||
| Loopback 1 | 3.3.3.3/32 | |||
| Route Reflector 1 | RR1 | IOS-XR | GigabitEthernet 0/0/0/3 | 10.0.34.4/24 |
| GigabitEthernet 0/0/0/2 | 10.0.45.4/24 | |||
| Loopback 1 | 4.4.4.4/32 | |||
| Provider 2 | P2 | IOS | Ethernet 0/2 | 10.0.45.5/24 |
| Ethernet 0/3 | 10.0.56.5/24 | |||
| Loopback 1 | 5.5.5.5/32 | |||
| Provider Edge 2 | PE2 | IOS-XR | GigabitEthernet 0/0/0/4 | |
| Loopback 1 | Area 0 |
Verify OSPF configured as per table below.
| Device | OSPF Process | Interface | Area |
|---|---|---|---|
| Provider Edge 1 | 1 | Ethernet 0/2 | Area 0 |
| 1 | Loopback 1 | Area 0 | |
| Provider 1 | 1 | GigabitEthernet 0/0/0/2 | Area 0 |
| 1 | GigabitEthernet 0/0/0/3 | Area 0 | |
| 1 | Loopback 1 | Area 0 | |
| Route Reflector 1 | 1 | GigabitEthernet 0/0/0/3 | Area 0 |
| 1 | GigabitEthernet 0/0/0/2 | Area 0 | |
| 1 | Loopback 1 | Area 0 | |
| Provider 2 | 1 | Ethernet 0/2 | Area 0 |
| 1 | Ethernet 0/3 | Area 0 | |
| 1 | Loopback 1 | Area 0 | |
| Provider Edge 2 | 1 | GigabitEthernet 0/0/0/4 | Area 0 |
| 1 | Loopback 1 | Area 0 |
Task 2: Configure BGP in AS 3
Configure BGP as per requirement mentioned below:
- BGP AS Number for the Service provider is AS 3.
- IBGP neighborship to be formed between PE1 and RR1 using their Loopback 1 interface.
- IBGP neighborship to be formed between PE2 and RR1 using their Loopback 1 interface.
- Advertise Loopback 0 interfaces for PE1, RR1 & PE2.
- Disable all default address-family for Ipv4 and all neighbors must be enabled manually.
PE1#configure terminal
PE1(config)#router bgp 3
PE1(config-router)# no bgp default ipv4-unicast
PE1(config-router)# neighbor 4.4.4.4 remote-as 3
PE1(config-router)# neighbor 4.4.4.4 update-source Loopback1
PE1(config-router)# address-family ipv4
PE1(config-router-af)# neighbor 4.4.4.4 activate
PE1(config-router-af)#network 2.2.2.2 mask 255.255.255.255
PE1(config-router-af)#end
PE1#write memory
RP/0/0/CPU0:RR1#configure
RP/0/0/CPU0:RR1(config)#router bgp 3
RP/0/0/CPU0:RR1(config-bgp)# address-family ipv4 unicast
RP/0/0/CPU0:RR1(config-bgp-af)# network 4.4.4.4/32
RP/0/0/CPU0:RR1(config-bgp-af)# neighbor 2.2.2.2
RP/0/0/CPU0:RR1(config-bgp-nbr)# remote-as 3
RP/0/0/CPU0:RR1(config-bgp-nbr)# update-source Loopback1
RP/0/0/CPU0:RR1(config-bgp-nbr)# address-family ipv4 unicast
RP/0/0/CPU0:RR1(config-bgp-nbr-af)# route-reflector-client
RP/0/0/CPU0:RR1(config-bgp-nbr-af)# neighbor 6.6.6.6
RP/0/0/CPU0:RR1(config-bgp-nbr)# remote-as 3
RP/0/0/CPU0:RR1(config-bgp-nbr)#update-source Loopback1
RP/0/0/CPU0:RR1(config-bgp-nbr)#address-family ipv4 unicast
RP/0/0/CPU0:RR1(config-bgp-nbr-af)# route-reflector-client
RP/0/0/CPU0:RR1(config-bgp-nbr-af)#commit
RP/0/0/CPU0:RR1(config-bgp-nbr-af)#end
RP/0/0/CPU0:PE2#configure
RP/0/0/CPU0:PE2(config)#router bgp 3
RP/0/0/CPU0:PE2(config-bgp)#address-family ipv4 unicast
RP/0/0/CPU0:PE2(config-bgp-af)#network 6.6.6.6/32
RP/0/0/CPU0:PE2(config-bgp-af)#exit
RP/0/0/CPU0:PE2(config-bgp)#neighbor 4.4.4.4
RP/0/0/CPU0:PE2(config-bgp-nbr)#remote-as 3
RP/0/0/CPU0:PE2(config-bgp-nbr)#update-source loopback 1
RP/0/0/CPU0:PE2(config-bgp-nbr)#address-family ipv4 unicast
RP/0/0/CPU0:PE2(config-bgp-nbr-af)#commit
RP/0/0/CPU0:PE2(config-bgp-nbr-af)#end
Task 3: Verify BGP Configuration
PE1#show bgp ipv4 unicast summary
BGP router identifier 2.2.2.2, local AS number 3
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
4.4.4.4 4 3 12 12 6 0 0 00:06:55 2
RP/0/0/CPU0:RR1#show bgp ipv4 unicast summary
BGP router identifier 4.4.4.4, local AS number 3
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
2.2.2.2 0 3 14 13 5 0 0 00:07:51 1
6.6.6.6 0 3 7 9 5 0 0 00:02:12 1
RP/0/0/CPU0:PE2#show bgp ipv4 unicast summary
BGP router identifier 6.6.6.6, local AS number 3
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
4.4.4.4 0 3 10 8 5 0 0 00:03:43 2
PE1#show bgp ipv4 unicast
Network Next Hop Metric LocPrf Weight Path *> 2.2.2.2/32 0.0.0.0 0 32768 i r>i 4.4.4.4/32 4.4.4.4 0 100 0 i r>i 6.6.6.6/32 6.6.6.6 0 100 0 i
RP/0/0/CPU0:RR1#show bgp ipv4 unicast
Network Next Hop Metric LocPrf Weight Path
*>i2.2.2.2/32 2.2.2.2 0 100 0 i
*> 4.4.4.4/32 0.0.0.0 0 32768 i
*>i6.6.6.6/32 6.6.6.6 0 100 0 i
RP/0/0/CPU0:PE2#show bgp ipv4 unicast
Network Next Hop Metric LocPrf Weight Path
*>i2.2.2.2/32 2.2.2.2 0 100 0 i
*>i4.4.4.4/32 4.4.4.4 0 100 0 i
*> 6.6.6.6/32 0.0.0.0 0 32768 i
Task 4: Verify BGP update information.
PE1#show bgp ipv4 unicast summary
BGP router identifier 2.2.2.2, local AS number 3 BGP table version is 6, main routing table version 6 Neighbor V AS MsgRcvd MsgSent Up/Down State/PfxRcd 4.4.4.4 4 3 14 13 00:08:41 2
RP/0/0/CPU0:RR1#show bgp ipv4 unicast summary
BGP router identifier 4.4.4.4, local AS number 3 BGP scan interval 60 secs Neighbor AS MsgRcvd MsgSent Up/Down State/PfxRcd 2.2.2.2 3 16 17 00:11:25 1 6.6.6.6 3 8 11 00:03:11 1
Task 5: Configure Multi-Protoocl BGP.
Configure MP-BGP between PE1 and RR1 with RR1 being Router-reflector. Configure MP-BGP between PE2 and RR1 with RR1 being Router-reflector.
PE1#configure terminal
PE1(config)#router bgp 3
PE1(config-router)#address-family vpnv4 unicast
PE1(config-router-af)#neighbor 4.4.4.4 activate
PE1(config-router-af)#end
PE1#write memory
RP/0/0/CPU0:RR1#configure
RP/0/0/CPU0:RR1(config)#router bgp 3
RP/0/0/CPU0:RR1(config-bgp)#address-family vpnv4 unicast
RP/0/0/CPU0:RR1(config-bgp)#neighbor 2.2.2.2
RP/0/0/CPU0:RR1(config-bgp-nbr)#address-family vpnv4 unicast
RP/0/0/CPU0:RR1(config-bgp-nbr-af)#route-reflector-client
RP/0/0/CPU0:RR1(config-bgp-nbr-af)#neighbor 6.6.6.6
RP/0/0/CPU0:RR1(config-bgp-nbr)#address-family vpnv4 unicast
RP/0/0/CPU0:RR1(config-bgp-nbr-af)#route-reflector-client
RP/0/0/CPU0:RR1(config-bgp-nbr-af)#commit
RP/0/0/CPU0:RR1(config-bgp)#address-family vpnv4 unicast
RP/0/0/CPU0:RR1(config-bgp)#end
RP/0/0/CPU0:PE2#configure
RP/0/0/CPU0:PE2(config)#router bgp 3
RP/0/0/CPU0:PE2(config-bgp)#address-family vpnv4 unicast
RP/0/0/CPU0:PE2(config-bgp-af)#exit
RP/0/0/CPU0:PE2(config-bgp)#neighbor 4.4.4.4
RP/0/0/CPU0:PE2(config-bgp-nbr)#address-family vpnv4 unicast
RP/0/0/CPU0:PE2(config-bgp-nbr-af)#commit
RP/0/0/CPU0:PE2(config-bgp-nbr-af)#end
Task 6: Verify Multi-Protoocl BGP.
PE1#show bgp ipv4 unicast neighbors | inc BGP neighbor|VPNv4
BGP neighbor is 4.4.4.4, remote AS 3, internal link
Address family VPNv4 Unicast: advertised and received
For address family: VPNv4 Unicast
RP/0/0/CPU0:RR1#show bgp ipv4 unicast neighbors | inc "BGP neighbor|VPNv4 Uni
Sat Jun 12 02:57:22.841 UTC
BGP neighbor is 2.2.2.2
Address family VPNv4 Unicast: advertised and received
BGP neighbor version 15
For Address Family: VPNv4 Unicast
BGP neighbor version 9
BGP neighbor is 6.6.6.6
Address family VPNv4 Unicast: advertised and received
BGP neighbor version 15
For Address Family: VPNv4 Unicast
BGP neighbor version 9
RP/0/0/CPU0:PE2#show bgp ipv4 unicast neighbors | inc "BGP neighbor|VPNv4 Uni"
Sat Jun 12 02:57:49.973 UTC
BGP neighbor is 4.4.4.4
Address family VPNv4 Unicast: advertised and received
BGP neighbor version 17
For Address Family: VPNv4 Unicast
BGP neighbor version 19