We run our etherchannels between 65xx platforms in "on" mode. This way we don't have to police the allowed VLANS on the trunks and can make VLAN allowed additions/deletions with the trunk and EC staying up. But I've heard that there is a downside to running etherchannel in "on" mode having to do with potential STP loops? Would like to know the detailed explanation. TIA.
Spanning Tree Protocol sees an EtherChannel as a single port. This presents a danger of creating forwarding loops if channeling ports are not consistent on both sides of the channel. Cisco has developed a special mechanism to detect and disable channel inconsistency to prevent packet duplication, looping, and other issues associated with inconsistent EtherChannels.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...