In XR 5.3.0 we will be enabling BGP NSR by default to be on.
Since default changes always catch us by surprise I wanted to give a heads up notification.
NSR helps with the redundancy by sending, for BGP that is, TCP packets via the standby router to synchronize the TCP sequence numbers, so that when there is a control plane or RSP failover, the peer doesnt even realize that the affected router failed over its control plane. Graceful restart (GR), can help here too by providing a grace period on the peer before tearing the session down, allowing the control plane to reestablish the adjacency. NSR in that regard is more powerful since GR requires peer support and GR also results in temporary "headless" routing (during the GR and adj reestablishment).
XR's scale is always tested with NSR. BGP in XR supports 5000 bgp peerings and beyond easily.
Is it possible, on the same router, to advertise EVPN IRB adjacencies in VPNv4, and vanilla IPv4 unicast? They advertise in EVPN as RT-2 just fine, but we have some VPNv4 and IPv4 (VRF-Lite) peers we'd like to advertise those host routes to as well. This ...
Hi, I have a case where I need to establish a CFM session between a downward MEP and upward MEP. Is this possible? Or CFM session is always between either two downward MEPs or two upward MEPs. Any reply is much appreciated. Thanks
I configured ISIS, ldp, l2vp between XRv-Juniper and XRv-Nokia. The l2vpn connection between XRv-Juniper works fine. But l2vpn connection XRv-Nokia doesn't work well. Nokia side is up, Cisco side is down.Cisco side:interface GigabitEthernet0/0...
Hi, Guys, I'm facing a problem on BGP with IPv6 family unicast, Router A with IOS-XR and Router B has established the BGP IPv6 neighbor but they're not able to advertise the prefixs(IPv6 address of loopback 0) to each other.BTW, they're not in the sa...