Re: Software upgradation time

Karthikeyan Subramaniam wrote:
> Hi,
> 
>    I have doubt about restart timer value in protocols.
> 
> In OSPF default restart timer is specified as 120 seconds in the draft
> "draft-ietf-ospf-hitless-restart-07.txt" and in the case of BGP default
> restart timer should not be greater than the HOLDTIME(suggested value as
> per RFC 1771 is 90 secs)carried in OPEN.
> 
> Can control software  be upgraded within 120/90 seconds?

I guess that depends on your implementation and the type of upgrade. If
your software is modular it is certainly enough time for an incremental
upgrade or a switchover to a redundant control processor.

> On what basis
> this timer value has been fixed?

This was thought to be an upper bound on restart time, redistribution, and
synchronization with other protocols. The restart should complete much sooner.
Note the timer value is configurable.

> 
> with regards,
> S.Karthikeyan.
> 
> 
> 
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-- 
Acee

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