About Andrew.Gray

Andrew.Gray · 01-25-2011

HiI have a problem with spurious loss of EIGRP neighbour relationships following the introduction of some IOS 15.1(x) into our network. Here's a rough diagram of the topology in question.Core sites - summarising out RFC 1918 address space to branch. ...

Andrew.Gray · 07-14-2008

CSS keepalive TCP flagsHi. I have a problem with the way an application behaves in response to CSS tcp keepalives, I'd be grateful for any advice.Using standard TCP keepalives, an application logs a broken connection for every keepalive, filling up t...

Andrew.Gray · 03-23-2004

HiI'd be grateful if anyone could advise how I can find out what DRAM simms are in what slots on 2651s running a slightly venerable IOS (12.2(3d))The command sh c2600 shows the DRAM slot contents when run on the IOS we want to upgrade to, but not on ...

Andrew.Gray · 11-08-2002

HelloI'm building an SGBP solution for branch backup and have beenexperimenting with virtual-template/virtual access interfaces and seensome truly bizarre results.To put it simply, I have a branch with two routers. One is normallyconnected back to th...

Andrew.Gray · 01-27-2011

HerveThanks very much for the reply. Fixing the IP MTU size at the 1500 bytes the core end PA-A3-OC3SMI on 12.4 supports fixes the problem.Querying MTU sizes on the physical interfaces there's no obvious difference between IOS 12.x and 15.x, 4470 byt...

Andrew.Gray · 07-15-2008

Thanks for the replies.I've tried tcp-close fin, it stops an error being logged, but the application still logs the connection.I wouldn't be concerned, other than the fact it clearly is possible to both establish that the service is running on the se...

Andrew.Gray · 11-13-2002

As it turns out the answer is painfully obvious.Bringing back up the serial line actually creates a new virtual access interface, which since it's cloned from the config intended for ISDN, isn't properly configured for the serial line. I hadn't antic...

Andrew.Gray · 11-08-2002

You could also use RIP routing over ISDN to inject a summary of the branch into HQ, with an appropriate admin distance.Once the serial line comes back up the EIGRP (or OSPF?) reconvergence should replace both the RIP injected route at HQ and suppress...

Member Since	‎11-08-2002 04:03 AM
Date Last Visited	‎08-18-2017 03:50 AM
Posts	8

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EIGRP behaviour change in IOS 15.1(x)

CSS keepalive TCP flags

2651 memory

EIGRP and Virtual-access interfaces

Re: EIGRP behaviour change in IOS 15.1(x)

Re: CSS keepalive TCP flags

Re: EIGRP and Virtual-access interfaces

Re: ISDN Routing !!!