BGP pinging layer 3 switch

sisqo2006 · ‎06-23-2015

Hi guys,

I have been trying to familiarise myself with BGP and have come across an issue that I would like some assistance with. My set up is as follows:

I have 2 routers and 2 switches (L3)

R1 connects to R2 and uses BGP R1 G0/0> 10.10.10.1 R2 G0/0> 10.10.10.2

R1 connects to SW1 and uses EIGRP R1 G0/1 11.11.11.1 SW Fa0/1> 11.11.11.2

R2 connects to SW2 and uses EIGRP R1 G0/1 12.12.12.1 SW Fa0/1> 12.12.12.2

The issue that I have is that if I try to ping 11.11.11.2 from R2 it fails (the same applies to R1 if I try ping 12.12.12.2)

Hopefully the configs will explain a bit more, can anyone give me some info on this please?

R1:

Router#sh run
Building configuration...

Current configuration : 791 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
license udi pid CISCO1941/K9 sn FTX152422EV
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface GigabitEthernet0/0
ip address 10.10.10.1 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address 11.11.11.1 255.255.255.252
duplex auto
speed auto
!
interface Vlan1
no ip address
shutdown
!
router eigrp 1
redistribute bgp 66
network 11.11.11.0 0.0.0.3
auto-summary
!
router bgp 66
bgp log-neighbor-changes
no synchronization
neighbor 10.10.10.2 remote-as 77
network 11.11.11.0 mask 255.255.255.252
!
ip classless
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end

R2:

Router#sh run
Building configuration...

Current configuration : 791 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
license udi pid CISCO1941/K9 sn FTX15243T7E
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface GigabitEthernet0/0
ip address 10.10.10.2 255.255.255.252
duplex auto
speed auto
!
interface GigabitEthernet0/1
ip address 12.12.12.1 255.255.255.252
duplex auto
speed auto
!
interface Vlan1
no ip address
shutdown
!
router eigrp 1
redistribute bgp 77
network 12.12.12.0 0.0.0.3
auto-summary
!
router bgp 77
bgp log-neighbor-changes
no synchronization
neighbor 10.10.10.1 remote-as 66
network 12.12.12.0 mask 255.255.255.252
!
ip classless
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end

SW1:

Switch#sh run
Building configuration...

Current configuration : 1233 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
ip routing
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface FastEthernet0/1
no switchport
ip address 11.11.11.2 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
router eigrp 1
network 11.11.11.0 0.0.0.3
auto-summary
!
ip classless
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end

SW2:

Switch>en
Switch#sh run
Building configuration...

Current configuration : 1233 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Switch
!
!
!
!
!
ip routing
!
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
!
!
!
!
interface FastEthernet0/1
no switchport
ip address 12.12.12.2 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
router eigrp 1
network 12.12.12.0 0.0.0.3
auto-summary
!
ip classless
!
!
!
!
!
!
!
line con 0
!
line aux 0
!
line vty 0 4
login
!
!
!
end

David_Che · ‎06-23-2015

SW1 and SW2 did no have route to 10.10.10.x/252. please advertise them into EIGRP.

sisqo2006 · ‎06-24-2015

How do I provide this route. I thought if i used the redistribute bgp it would work. Any examples please?

Jon Marshall · ‎06-24-2015

You need to specify a metric when you redistribute into EIGRP.

So you can either specify it with the redistribute command or you can specific a default metric under your EIGRP process.

Jon

sisqo2006 · ‎06-24-2015

Sorry I forgot to mention that I also applied a metric to the command.Still no success.

Jon Marshall · ‎06-24-2015

Can you post -

1) "sh ip bgp summary" from both routers

2) "sh ip route" from all devices

Jon