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Home > Archive > CCNP > April 2003 > Live scenario question
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Live scenario question
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| I manage a network for one of our customers which consists of about 300 remote routers which run RIP back to to four core routers (via some 30 or so intermediate concentrator routers) The core routers have ethernet connectivity into a 3Comm switched network. From there, the application servers are dual homed into the switches, and the switches are dual homed into the core routers.
Today, there was a Spanning Tree problem and STP re-computed.
The questions is this; whilst STP
re-computes, do all the end users lose their sessions to the application servers?
Hippo
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| darthfeces 2003-04-02, 10:46 pm |
| wow rip for that many routers ?????
time for ospf .....
spanning tree's purpose is to prevent briging loops in a flat switched network ....
spanning tree reconverging is a normal occurance.
it can take from 20 sec to a minute and yes
you could see a blackout in connectivity until ports move to forwarding .... | |
| Hippo 2003-04-02, 11:04 pm |
| Cheers darthfeces
Actually, each concentrator router has about 10 remote routers attached, and each concentrator router connects to two out of the four core routers. So, the RIP hop count is low, although you are right about moving to OSPF. When we have a core router crash, the convergence time is long enough to stir the big bosses into throwing all their toys out of the pram. 
The STP answer you gave was what I wanted to hear. Cos we got a lot flack from end users after that event. Now I need to convince the company whose network we manage that THEY have a problem on THEIR switched ethernet network. I wish we managed it instead of them, then these things would not happen.
Cheers
Hippo
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