It's about my CCIE journey: Lab 6. BGP Route Reflector

iBGP must full mesh. So if not full mesh there are 2 solution:

Route Reflector. The router become BGP reflector. So all iBGP router have neighbor to route reflector for BGP peering.
BGP Confederation. There is Sub-AS in AS

Let’s make R4 as route reflector. So R1 and R2 only connect to R4 for iBGP peering.

R1#

interface Loopback0

ip address 1.1.1.1 255.255.255.255

interface Loopback1

ip address 11.11.11.11 255.255.255.255

interface FastEthernet0/0

ip address 12.12.12.1 255.255.255.0

no shu

interface Serial0/0

ip address 14.14.14.1 255.255.255.0

no shu

router rip

ver 2

net 1.0.0.0

net 12.0.0.0

net 14.0.0.0

no auto

router bgp 124

neighbor 4.4.4.4 remote-as 124

neighbor 4.4.4.4 update-source loopback0

neighbor 4.4.4.4 next-hop-self

net 11.11.11.11 mask 255.255.255.255

R2#

interface Loopback0

ip address 2.2.2.2 255.255.255.255

interface FastEthernet0/0

ip address 12.12.12.2 255.255.255.0

no shu

interface Serial0/0

ip address 23.23.23.2 255.255.255.0

no shu

router rip

ver 2

net 2.0.0.0

net 12.0.0.0

no auto

router bgp 124

neighbor 4.4.4.4 remote-as 124

neighbor 4.4.4.4 update-source loopback0

neighbor 4.4.4.4 next-hop-self

neighbor 23.23.23.3 remote-as 3

redistribute rip

redistribute connected

R3#

interface Loopback0

ip address 3.3.3.3 255.255.255.255

interface Serial0/0

ip address 23.23.23.3 255.255.255.0

no shu

router bgp 3

neighbor 23.23.23.2 remote-as 124

net 3.3.3.3 mask 255.255.255.255

R4# --- - > Route reflector

interface Loopback0

ip address 4.4.4.4 255.255.255.255

interface Serial0/0

ip address 14.14.14.4 255.255.255.0

no shu

router rip

ver 2

net 4.0.0.0

net 14.0.0.0

no auto

router bgp 124

neighbor 1.1.1.1 remote-as 124

neighbor 1.1.1.1 update-source loopback0

neighbor 1.1.1.1 next-hop-self

neighbor 1.1.1.1 route-reflector-client

neighbor 2.2.2.2 remote-as 124

neighbor 2.2.2.2 update-source loopback0

neighbor 2.2.2.2 next-hop-self

neighbor 2.2.2.2 route-reflector-client

Let’s verify the bgp

R1(config-if)#do sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

C 1.1.1.1 is directly connected, Loopback0

2.0.0.0/32 is subnetted, 1 subnets

R 2.2.2.2 [120/1] via 12.12.12.2, 00:00:26, FastEthernet0/0

3.0.0.0/32 is subnetted, 1 subnets

B 3.3.3.3 [200/0] via 2.2.2.2, 00:05:33

4.0.0.0/32 is subnetted, 1 subnets

R 4.4.4.4 [120/1] via 14.14.14.4, 00:00:23, Serial0/0

23.0.0.0/24 is subnetted, 1 subnets

B 23.23.23.0 [200/0] via 2.2.2.2, 00:02:33

11.0.0.0/32 is subnetted, 1 subnets

C 11.11.11.11 is directly connected, Loopback1

12.0.0.0/24 is subnetted, 1 subnets

C 12.12.12.0 is directly connected, FastEthernet0/0

14.0.0.0/24 is subnetted, 1 subnets

C 14.14.14.0 is directly connected, Serial0/0

R1(config-if)#do sh ip bgp

BGP table version is 23, local router ID is 1.1.1.1

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

r>i1.1.1.1/32 2.2.2.2 1 100 0 ?

r>i2.2.2.2/32 2.2.2.2 0 100 0 ?

*>i3.3.3.3/32 2.2.2.2 0 100 0 3 i

r>i4.4.4.4/32 2.2.2.2 2 100 0 ?

*> 11.11.11.11/32 0.0.0.0 0 32768 i

r>i12.12.12.0/24 2.2.2.2 0 100 0 ?

r>i14.14.14.0/24 2.2.2.2 1 100 0 ?

*>i23.23.23.0/24 2.2.2.2 0 100 0 ?

R1(config-if)#do sh ip bgp summ

BGP router identifier 1.1.1.1, local AS number 124

BGP table version is 23, main routing table version 23

8 network entries using 960 bytes of memory

8 path entries using 416 bytes of memory

6/5 BGP path/bestpath attribute entries using 744 bytes of memory

1 BGP rrinfo entries using 24 bytes of memory

1 BGP AS-PATH entries using 24 bytes of memory

0 BGP route-map cache entries using 0 bytes of memory

0 BGP filter-list cache entries using 0 bytes of memory

Bitfield cache entries: current 1 (at peak 1) using 32 bytes of memory

BGP using 2200 total bytes of memory

BGP activity 11/3 prefixes, 11/3 paths, scan interval 60 secs

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

4.4.4.4 4 124 19 11 23 0 0 00:07:13 7 --- > Peering only to RR

R2(config-router)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

R 1.1.1.1 [120/1] via 12.12.12.1, 00:00:25, FastEthernet0/0

2.0.0.0/32 is subnetted, 1 subnets

C 2.2.2.2 is directly connected, Loopback0

3.0.0.0/32 is subnetted, 1 subnets

B 3.3.3.3 [20/0] via 23.23.23.3, 00:05:55

4.0.0.0/32 is subnetted, 1 subnets

R 4.4.4.4 [120/2] via 12.12.12.1, 00:00:25, FastEthernet0/0

23.0.0.0/24 is subnetted, 1 subnets

C 23.23.23.0 is directly connected, Serial0/0

11.0.0.0/32 is subnetted, 1 subnets

B 11.11.11.11 [200/0] via 1.1.1.1, 00:04:33

12.0.0.0/24 is subnetted, 1 subnets

C 12.12.12.0 is directly connected, FastEthernet0/0

14.0.0.0/24 is subnetted, 1 subnets

R 14.14.14.0 [120/1] via 12.12.12.1, 00:00:01, FastEthernet0/0

R2(config-router)#do sh ip bgp

BGP table version is 15, local router ID is 2.2.2.2

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

*> 1.1.1.1/32 12.12.12.1 1 32768 ?

*> 2.2.2.2/32 0.0.0.0 0 32768 ?

*> 3.3.3.3/32 23.23.23.3 0 0 3 i

*> 4.4.4.4/32 12.12.12.1 2 32768 ?

*>i11.11.11.11/32 1.1.1.1 0 100 0 i

*> 12.12.12.0/24 0.0.0.0 0 32768 ?

*> 14.14.14.0/24 12.12.12.1 1 32768 ?

*> 23.23.23.0/24 0.0.0.0 0 32768 ?

R2(config-router)#do sh ip bgp summ

BGP router identifier 2.2.2.2, local AS number 124

BGP table version is 15, main routing table version 15

8 network entries using 960 bytes of memory

8 path entries using 416 bytes of memory

6/5 BGP path/bestpath attribute entries using 744 bytes of memory

1 BGP rrinfo entries using 24 bytes of memory

1 BGP AS-PATH entries using 24 bytes of memory

0 BGP route-map cache entries using 0 bytes of memory

0 BGP filter-list cache entries using 0 bytes of memory

Bitfield cache entries: current 3 (at peak 4) using 96 bytes of memory

BGP using 2264 total bytes of memory

BGP activity 8/0 prefixes, 11/3 paths, scan interval 60 secs

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

4.4.4.4 4 124 20 18 15 0 0 00:07:05 1 --- > Peering only to RR

23.23.23.3 4 3 11 18 15 0 0 00:06:13 1

R3(config-router)#do sh ip rou

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

B 1.1.1.1 [20/1] via 23.23.23.2, 00:02:12

2.0.0.0/32 is subnetted, 1 subnets

B 2.2.2.2 [20/0] via 23.23.23.2, 00:03:22

3.0.0.0/32 is subnetted, 1 subnets

C 3.3.3.3 is directly connected, Loopback0

4.0.0.0/32 is subnetted, 1 subnets

B 4.4.4.4 [20/2] via 23.23.23.2, 00:02:12

23.0.0.0/24 is subnetted, 1 subnets

C 23.23.23.0 is directly connected, Serial0/0

11.0.0.0/32 is subnetted, 1 subnets

B 11.11.11.11 [20/0] via 23.23.23.2, 00:05:00

12.0.0.0/24 is subnetted, 1 subnets

B 12.12.12.0 [20/0] via 23.23.23.2, 00:03:24

14.0.0.0/24 is subnetted, 1 subnets

B 14.14.14.0 [20/1] via 23.23.23.2, 00:02:14

R3(config-router)#do sh ip bgp

BGP table version is 16, local router ID is 3.3.3.3

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

*> 1.1.1.1/32 23.23.23.2 1 0 124 ?

*> 2.2.2.2/32 23.23.23.2 0 0 124 ?

*> 3.3.3.3/32 0.0.0.0 0 32768 i

*> 4.4.4.4/32 23.23.23.2 2 0 124 ?

*> 11.11.11.11/32 23.23.23.2 0 124 i

*> 12.12.12.0/24 23.23.23.2 0 0 124 ?

*> 14.14.14.0/24 23.23.23.2 1 0 124 ?

r> 23.23.23.0/24 23.23.23.2 0 0 124 ?

R3(config-router)#do sh ip bgp summ

BGP router identifier 3.3.3.3, local AS number 3

BGP table version is 16, main routing table version 16

8 network entries using 960 bytes of memory

8 path entries using 416 bytes of memory

6/5 BGP path/bestpath attribute entries using 744 bytes of memory

1 BGP AS-PATH entries using 24 bytes of memory

0 BGP route-map cache entries using 0 bytes of memory

0 BGP filter-list cache entries using 0 bytes of memory

Bitfield cache entries: current 1 (at peak 1) using 32 bytes of memory

BGP using 2176 total bytes of memory

BGP activity 8/0 prefixes, 11/3 paths, scan interval 60 secs

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

23.23.23.2 4 124 18 11 16 0 0 00:06:36 7

R4(config-router)#do sh ip rout

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

R 1.1.1.1 [120/1] via 14.14.14.1, 00:00:00, Serial0/0

2.0.0.0/32 is subnetted, 1 subnets

R 2.2.2.2 [120/2] via 14.14.14.1, 00:00:00, Serial0/0

3.0.0.0/32 is subnetted, 1 subnets

B 3.3.3.3 [200/0] via 2.2.2.2, 00:07:59

4.0.0.0/32 is subnetted, 1 subnets

C 4.4.4.4 is directly connected, Loopback0

23.0.0.0/24 is subnetted, 1 subnets

B 23.23.23.0 [200/0] via 2.2.2.2, 00:04:58

11.0.0.0/32 is subnetted, 1 subnets

B 11.11.11.11 [200/0] via 1.1.1.1, 00:06:37

12.0.0.0/24 is subnetted, 1 subnets

R 12.12.12.0 [120/1] via 14.14.14.1, 00:00:02, Serial0/0

14.0.0.0/24 is subnetted, 1 subnets

C 14.14.14.0 is directly connected, Serial0/0

R4(config-router)#do sh ip bgp summ

BGP router identifier 4.4.4.4, local AS number 124

BGP table version is 23, main routing table version 23

8 network entries using 960 bytes of memory

8 path entries using 416 bytes of memory

6/5 BGP path/bestpath attribute entries using 744 bytes of memory

1 BGP AS-PATH entries using 24 bytes of memory

0 BGP route-map cache entries using 0 bytes of memory

0 BGP filter-list cache entries using 0 bytes of memory

Bitfield cache entries: current 1 (at peak 2) using 32 bytes of memory

BGP using 2176 total bytes of memory

BGP activity 8/0 prefixes, 11/3 paths, scan interval 60 secs

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

1.1.1.1 4 124 13 21 23 0 0 00:09:36 1 --- > RR Client

2.2.2.2 4 124 19 21 23 0 0 00:08:59 7 --- > RR Client

R4(config-router)#do sh ip bgp

BGP table version is 23, local router ID is 4.4.4.4

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

r>i1.1.1.1/32 2.2.2.2 1 100 0 ?

r>i2.2.2.2/32 2.2.2.2 0 100 0 ?

*>i3.3.3.3/32 2.2.2.2 0 100 0 3 i

r>i4.4.4.4/32 2.2.2.2 2 100 0 ?

*>i11.11.11.11/32 1.1.1.1 0 100 0 i

r>i12.12.12.0/24 2.2.2.2 0 100 0 ?

r>i14.14.14.0/24 2.2.2.2 1 100 0 ?

*>i23.23.23.0/24 2.2.2.2 0 100 0 ?

Make sure can ping each other

R4(config-router)#do ping 3.3.3.3

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 20/70/112 ms

R3(config-router)#do ping 4.4.4.4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 4.4.4.4, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 28/70/100 ms

It's about my CCIE journey

My Countingdown

Tuesday, December 13, 2011

Lab 6. BGP Route Reflector

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