N4064F Port Channel Help / BGP flapping

Question

I'm looking for some help with BGP/Port Channels. We have a N4064F stack with a single WAN uplink, tried putting it and an additional port into a port channel but had some issues with BGP. The port channel shows both ports as active and in the port channel. However I am unable to ping the WAN IP and the BGP connection to WAN neighbor is resetting about every 4 min.  Before the port channel it was just a access port: switchport access vlan 50 to put the ports into the port channel changed the port configs to the following: channel-group 50 mode activedescription 'Port Channel' and: #show running-config interface port-channel 50 description 'Port Channel'switchport access vlan 50 both ports come up and go into the port channel but I can no longer ping the WAN IP. I've confirmed the other side of the port channel in mode active as well. BGP will then reset about every four minutes: BGP[BGP Protocol]: bgppeer.c(2962) 259755 %% [VRF ''] BGP neighbor at x.x.x.x transitioned from OPENCONFIRM to ESTABLISHED on event KEEPALIVE RECEIVED.BGP[BGP Protocol]: bgppeer.c(2962) 259754 %% [VRF ''] BGP neighbor at x.x.x.x transitioned from OPENSENT to OPENCONFIRM on event OPEN RECEIVED.BGP[BGP Protocol]: bgppeer.c(5249) 259753 %% [VRF ''] Ignoring unsupported capability 65 from peer x.x.x.xBGP[BGP Protocol]: bgppeer.c(5249) 259752 %% [VRF ''] Ignoring unsupported capability 70 from peer x.x.x.xBGP[BGP Protocol]: bgppeer.c(5249) 259751 %% [VRF ''] Ignoring unsupported capability 128 from peer x.x.x.xBGP[BGP Protocol]: bgppeer.c(2962) 259750 %% [VRF ''] BGP neighbor at x.x.x.x transitioned from ACTIVE to OPENSENT on event TCP CONNECTION OPEN.TRAPMGR[trapTask]: traputil.c(721) 259749 %% Bgp backwards transition for peer x.x.x.x New State:[1]. Last error:[4]. Last suberror:[0]BGP[BGP Protocol]: bgppeer.c(2962) 259748 %% [VRF ''] BGP neighbor at x.x.x.x transitioned from ESTABLISHED to IDLE on event NOTIFICATION RECEIVED. There is another port channel on this stack that has been in place for quite a while, and I start seeing the following: BGP[BGP Protocol]: bgpnh.c(1931) 259760 %% [VRF ''] Received path from peer x.x.x.2 with invalid BGP NEXT HOP x.x.x.1. This address is an address on this router and cannot be used as the next hop.BGP[BGP Protocol]: bgpnh.c(1931) 259759 %% [VRF ''] Received path from peer x.x.x.2 with invalid BGP NEXT HOP x.x.x.1. This address is an address on this router and cannot be used as the next hop.BGP[BGP Protocol]: bgpnh.c(1931) 259758 %% [VRF ''] Received path from peer x.x.x.2 with invalid BGP NEXT HOP x.x.x.1. This address is an address on this router and cannot be used as the next hop. Any guidance as to where I should be looking would be greatly appreciated!

DELL-Josh Cr · Answer

Hi, Does it show any spanning-tree errors? Is the firmware up to date?

Networking General

Was this post helpful?