I have a series of routers (Cisco ISR 1811) that has defaulted to an MTU size of 17867. This only happens on tunnel interfaces, and seems to happen for all tunnel interfaces on that series router.  The MTU on my 2811 & 2821 all default to MTU 1514 by...

I have noticed there are no syslog messages about the change in status of my etherchannel group. Is there a way to enable this?Thank You

I know this is not a Cisco issue, but it is a networking issue and this is the best group of networking people I can ask. We have a Windows 2008 server running RIPv2. It is successfully sending routes to our Cisco router. However when I create a ...

I recently disabled Aggressive Mode on all my routers with "crypto isakmp aggressive-mode disable". I am now getting the following syslog message for all of the routers. %CRYPTO-5-IKMP_AG_MODE_DISABLED: Unable to initiate or respond to Aggressive M...

Is there a way to disable isakmp on interfaces that don't need it? Other then writing ACLs? For example my IOS routers are responding to udp 500 on the inside interfaces, and I really only need it on the outside. Not a really big deal, but the aud...