rs client and bgp soft reload out

[Ondrej Zajicek]

On Thu, Jan 24, 2013 at 11:55:39PM +0800, Jimmy Halim wrote:
> Hi guys,
> 
> I have 2 BGP related questions that would like to confirm with you guys:
> 
> 	1. Can we run the route server without setting "rs client" BGP
> configuration in each client? I can bring up the eBGP as well without that
> setting in place.

Hello

You could, but in that case your BGP ASN would be in AS path, which is
usually considered unwanted for route servers. Also MULTI_EXIT_DISC is
reset when forwarded as usual, but kept when forwarded as route server.
And there is a different default for IPv6 and missing link-local address
(see 'missing lladdr' option).

> 	2. Birdc reload out "protocol_name" command will do soft reload on the
> exported routes to that particular neighbour. However this will reset the
> uptime. Any idea whether we can keep the uptime? It is very worrying while
> doing the troubleshooting if the uptime is not reflecting the correct

You mean 'state since' in 'show protocols'? This is not exactly uptime
of the BGP session, but the uptime of current protocol state. which
changed from 'up' to 'feed' and then back to 'up' during 'reload out'
(while the BGP session is up for the whole time).

We could probaly add some other counter to track BGP session uptime.

-- 
Elen sila lumenn' omentielvo

Ondrej 'SanTiago' Zajicek (email: santiago at crfreenet.org)
OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net)
"To err is human -- to blame it on a computer is even more so."
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