[c-nsp] t-1 load balancing options to deal with apparent congestion

[Jeff Chan]

On Friday, May 13, 2005, 6:21:51 AM, Jon Lewis wrote:
> On Fri, 13 May 2005, Jeff Chan wrote:

>> Ping times across the WAN run around 2 ms most of the time, but
>> some occasionally go to 100 or 200 ms.  It's possibly congestion

> Pinging the opposite router, or pinging something beyond the opposite
> router?

Both opposite routers and a few hops beyond on either side have
some occasional long pings.

> High response times when pinging the router don't necessarily
> mean much.

>> Are there other common sources of latency or congestion we should
>> be checking for?  What alternative configs should we consider,
>> particularly if we don't want to run MLPPP or per-packet load
>> balancing?  How does one diagnose sources of latency in such an
>> environment?

> Why wouldn't you run MLPPP?  I was afraid of it for years after having
> some bad experiences with trying to get it working, but have recently done
> several.

CPU usage, compatibility with some older CX blades, a little too
bleeding edge earlier on.  We may try MLPPP if we can finally
migrate off the CX-FSIP8s in the 7513, or move them to a PA or
'nother box.

Cheers,

Jeff C.
-- 
Jeff Chan
mailto:cisco-nsp at jeffchan.com
http://www.supranet.net/