07-07-2022 01:17 AM
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
Solved! Go to Solution.
07-07-2022 10:46 AM
Hi @sachin30720041 ,
I noticed the ebgp configuration after I replied. You should definitely use ibgp for VPLS deployment.
Regards,
07-07-2022 08:36 AM - edited 07-07-2022 09:54 AM
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,
07-07-2022 10:06 AM
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
07-07-2022 10:46 AM
Hi @sachin30720041 ,
I noticed the ebgp configuration after I replied. You should definitely use ibgp for VPLS deployment.
Regards,
07-07-2022 03:15 PM
next-hop-unchanged <- try add this eBGP neighbor
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