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ebgp-VPLS session. ping not working

sachin30720041
Level 1
Level 1

Hello All,

 

I have following set up. I have created an ebgp-VPLS session between CSR1 and CSR3. But ping between CSR16 and CSR17 is not working.

 

CSR16-----CSR1---------CSR2----------CSR3--------CSR17

Following is the configuration.

 

csr16
---------------
int gi1
no sh

 

int gi1.30
encap dot1q 30
ip address 100.10.10.16 255.255.255.0
no sh

 

CSR1
-------------------
int gi2
ip address 100.10.20.1 255.255.255.0
ip ospf 1 area 0
no sh

 

int lo0
ip address 1.1.1.1 255.255.255.255
ip ospf 1 area 0
exit

 

router ospf 1
mpls ldp autoconfig
exit

 

int gi1
service instance 100 ethernet
encap dot1q 30
exit
no sh


l2vpn vfi context ctx1
vpn id 123
autodiscovery bgp signaling bgp
ve id 1
exit

 

bridge-domain 100
member gig1 service-instance 100
member vfi ctx1
exit

 

router bgp 1
neighbor 3.3.3.3 remote-as 3
neighbor 3.3.3.3 update-source lo0
neighbor 3.3.3.3 ebgp-multihop
address-family l2vpn vpls
neighbor 3.3.3.3 activate
neighbor 3.3.3.3 suppress ldp
exit

 

CSR2
-------------------
int gi2
ip address 100.10.20.2 255.255.255.0
ip ospf 1 area 0
no sh

 

int gi1
ip address 100.20.30.2 255.255.255.0
ip ospf 1 area 0
no sh


int lo0
ip address 2.2.2.2 255.255.255.255
ip ospf 1 area 0
exit

 

router ospf 1
mpls ldp autoconfig

 

CSR3
-------------------
int gi1
ip ospf 1 area 0
ip address 100.20.30.3 255.255.255.0
no sh

 

int gi2
service instance 100 ethernet
encap dot1q 30
exit
no sh

 

int lo0
ip ospf 1 area 0
ip address 3.3.3.3 255.255.255.255
exit

 

router ospf 1
mpls ldp autoconfig
exit

 

l2vpn vfi context ctx1
vpn id 123
autodiscovery bgp signaling bgp
ve id 3
exit

 

bridge-domain 100
member gig2 service-instance 100
member vfi ctx1
exit

 

l2vpn
router-id 3.3.3.3
exit


router bgp 3
neighbor 1.1.1.1 remote-as 1
neighbor 1.1.1.1 update-source lo0
neighbor 1.1.1.1 ebgp-multihop
address-family l2vpn vpls
neighbor 1.1.1.1 activate
neighbor 1.1.1.1 suppress ldp
exit


csr17
---------------
int gi2
no sh

 

int gi2.30
encap dot1q 30
ip address 100.10.10.17 255.255.255.0
no sh

 

Thanks,

Sachin

1 Accepted Solution

Accepted Solutions

Hi @sachin30720041 ,

 

I noticed the ebgp configuration after I replied. You should definitely use ibgp for VPLS deployment.

 

Regards,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

View solution in original post

4 Replies 4

Harold Ritter
Level 12
Level 12

Hi @sachin30720041 ,

 

The CSR1000v requires a different way to configure the dot1q subinterfaces.

 

Please refer to the following post for more details on the way to configure it.

https://community.cisco.com/t5/mpls/configuring-bgp-evpn-with-cisco-csr/td-p/4469809

 

Regards,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

Hi Harold,

 

If I use the same config but change ebp-vpls session to ibgp-vpls session then ping works. Can we not use ebgp-VPLS  session for VPLS configuration ?

 

Thanks,

Sachin

Hi @sachin30720041 ,

 

I noticed the ebgp configuration after I replied. You should definitely use ibgp for VPLS deployment.

 

Regards,

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México

next-hop-unchanged <- try add this eBGP neighbor