Thursday, May 25, 2006

How do I load balance two paths in EIGRP without using the variance command?

How do I load balance two paths in EIGRP without using the variance command?

Well i needed to do this, and needed it done really fast.
A bit of google search revealed this good link.


http://ccnprecertification.com/2005/09/16/eigrp-load-balancing-without-using-variance/


I would suggest anybody wanting to do EIGRP load balancing read this out first.

Friday, May 19, 2006

not on common subnet for Serial.........

This is what happens when you get 2 new links from the same service provider between the two same end points.

We consistenly get thsi log on our router at both the ends.


May 19 05:28:58.458 GMT: IP-EIGRP(Default-IP-Routing-Table:6): Neighbor 10.10.10.10 not on common subnet for Serial1/0/7:0
May 19 05:29:12.390 GMT: IP-EIGRP(Default-IP-Routing-Table:6): Neighbor 10.10.10.10 not on common subnet for Serial1/0/7:0



Thus we need to get the physical port mapping correct by swapping the V.35 router cables or the G.703 cables leading to the modems.

Wednesday, May 10, 2006

c3845 with 256MB RAM hangs when trying to receive full internet routes

We have a cisco 3845 Router with 256MB RAM. It connects to our ISP on an E1.
The IOS on is c3845-entservicesk9-mz.124-5a.bin
The Utilisation ont eh E1 is less than 25% during the night times when we attempt the below:-

The problem is when we do a BGP peering with our Service Provider's core router, teh ROuter Hangs in less then 5 Secs.

When I say its hangs , it actually stops processing any IP INPUT.
The LEDS & Console are available at all times during the Hung state.
But I cant ping my own interfaces, All my BGP peers go down from ESTABLISHED to ACTIVE.
I lose all routes, including the ones i have from my IGP.

Reload is the only way to get the router UP again.

Is the hardware strong enough ?
If it is, Is this a software Bug ?

Any help from you folks will be greatly appreciated.