Iam enabling MPLS (LDP) on the backbone of my network. The connected routers are 7613 at the central location and 7200 at remote location. Both sides the e1 termination are on Channelised E1 ports
The topology is attached
The moment I enable ldp neighborship bet the routers i loose connectivity to the remote location routers ethernet and loopback ips. But all the device in the remote location lan say other routers switches and pcs are reachable
Iam pinging from a vlan (noc vlan) which is behind a firewall and connected to a cisco core switch 6500
The core routers ethernet is also connected to the same switch but this falls on diff vlan called wan vlan.
Iam running hsrp bet core routers ethernet.
I suspect some mtu issues . Should i adjust mtu in the ethernet
What I understood from your message is that the packets coming to the NOC 7613 router is passing through firewall and 6513 and then reaches the 7613.
If thats the case then 6500 L2 switch port ASCIIs don't accept the jumbo frame without the MTU command in the switchport. So try increasing the MTU to higher value by "MTU" command under the switchport connects to firewall and the 7613. Also you will need to configure "system jumbo mtu " global config command. Do the same stuff on the 7613 remote branch facing ethernet interface.
If it doesn't work please post the logical topology with the firewall and 6513 and 7613 connections.
But as one of our friend was suggeting to make the switch support the jumbo frames, I will try this also.
But I wonder as none of my ethernet interface is enabled with MPLS why should we alter the mtu.
A packet entering the backbone (mpls domain) at the LER 7200 at branch office the label is pushed on to the packet and it is poped at 7613 at noc.(next hop) and vice versa for packet leaving my noc towards branch location.
Iam enbabling ldp on serial interfaces only between these routers .
Further all my branch office which has 7200 has two links terminated on core router 1 and 2 links terminated on core router 2 .
Iam running hsrp on the ethernet side between the core routers on the noc side
Iam noticing a log on the branch router 7200
stating could not bind label for x.y.x.y (hsrp ip) as already bound for ldp neighbour y.y.y.y. Why is this log message appearing on the branch router
IS your 7613 and 7200 branch office router are connected directly through serial interface?. I understood from your previous message that there is a firewall before 7613 and both are interconnected by 6513 L2 switch ports (in WAN vlan).
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