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L2VPN VLAN TAG CONFIG ON CE END

Hamod
Level 1
Level 1

I have a L2VPN provided by a service provider from Branch A to Branch B. I was provided same VLAN ID 1137 to tag on my interface ron the two switches. At branch A, I’m using Cisco 3750g and Branch B I’m using a Netgear 4300 switch. I have configured the two switches with the provided VLAN and assign IP address on the interface. Currently the two switches can reach each other over the L2VPN. Also, Branch A LAN can reach Branch A switch and Branch B LAN can reach Branch B switch.

The problem now is that the existing LAN network on the two branches cannot reach one another which is the purpose of this L2VPN which is to provide connectivity between Branch A lan and Branch B lan. So I did a static route for both switches making the next hop of Branch A to be branch B switch and vice versa.
unfortunately, the two LAN still cannot communicate.
I’m new to this L2VPN.
I need your professional advice to resolve this issue. I await your kind feedback
Thanks in anticipation

10 Replies 10

rais
Level 7
Level 7

"Currently the two switches can reach each other over the L2VPN"........how are you seeing/checking this connectivity?

Thanks for your feedback

I configured an IP address on the VLAN 1137 provided on the switches and that's the only connection reachable at both end via the L2VPN

Branch A 172.16.100.2/24

Branch B 172.16.100.5/24

Only this network is reachable, others are not.

rais
Level 7
Level 7

What are the static routes you have configured on each side?

Hamod
Level 1
Level 1

Please find below as requested:

Branch A
ip route 192.168.0.0 255.255.255.0 172.16.100.5
ip route 192.168.120.0 255.255.255.0 172.16.100.5
ip route 192.168.125.0 255.255.255.0 172.16.100.5
Branch B
ip route 192.168.140.0 255.255.255.0 172.16.100.2
ip route 192.168.135.0 255.255.255.0 172.16.100.2
ip route 192.168.150.0 255.255.255.0 172.16.100.2

can you add static ARP in each CE for the IP of other side ?

rais
Level 7
Level 7

How does a traceroute look from each end?

Branch B

(M4300-12X12F) #traceroute 172.16.100.2

Traceroute to 172.16.100.2 ,30 hops max 0 byte packets:

1 172.16.100.2 <1 ms * <1 ms


Hop Count = 1 Last TTL = 1 Test attempt = 3 Test Success = 2


(M4300-12X12F) #traceroute 192.168.0.1

Traceroute to 192.168.0.1 ,30 hops max 0 byte packets:

1 172.16.100.5 Destination host unreachable Destination host unreachable Destination host unreachable


Hop Count = 1 Last TTL = 1 Test attempt = 3 Test Success = 0

Branch A

Lily_Core_SW_3750g#trace 172.16.100.5

Type escape sequence to abort.
Tracing the route to 172.16.100.5

1 172.16.100.5 8 msec 9 msec 8 msec
Lily_Core_SW_3750g#trace 192.168.253.1

Type escape sequence to abort.
Tracing the route to 192.168.253.1

1 * * *
2 * * *
3 * * *
4 * * *
5 * * *
6 *

Hello,

what Cisco device is this one, and which IOS version are you running ? Can you post the full running config of the Cisco ?

Hamod
Level 1
Level 1

The problem is now resolved after changing the DNS address to the local DNS server.

Good to know. Can you post the final configuration for reference ?

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