Having what appears to be an issue with EIGRP and router failover. We currently have multiple edge routers, one edge (MPLS)router serves as the primary link and another edge (Internet Based VPN) serves as our backup for remote offices. All edge routers run BGP/EIGRP mutually redistributing routes from BGP into EIGRP and Vice Versa. Our Core only speaks EIGRP, receiving routes from the Edge. When the primary link fails, traffic is divereted to the backup link as expected. when the primary link returns, the CORE doesn't remove the less desired route for the desired mpls edge, it continues to use the less desired VPN edge....
On the remote end, we are only speak BGP, peering with both the carrier and directly peering with our backup VPN router. We use the "BGP Weight" command to decide which link is desired and this works well...
During test, we noticed that the remote end, after the primary link is restored correctly receiveds and advertises routes to the primary carrier peer but our core still uses the backup edge router... the only thing that resolves the issue is a clear BGP peer or drop the backup GRE tunnel thus causing the Core to lose the previous installed - less desirable route.
We've tried Metric, AD and Bandwidth (BGP) Manipulation but no success.
Any help for what seems to be an straight forward issue, is greatly appreciated.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...