BGP keepalive/holdtime at GigE exchange

Fri Jan 12 08:31:35 UTC 2001

Lane,

    What about on Cisco's tweaking the global command "ip tcp synwait-time
X" so you don't have to wait so long for BGP to notice that the TCP session
no longer exists, there is probably a parallel command on Junos.  I haven't
tried it on BGP, but I would think that it would make BGP (and any other
protocol that relies on TCP sessions) much more sensitive.

marty

> -----Original Message-----
> From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu]On Behalf Of
> Lane Patterson
> Sent: Friday, January 12, 2001 1:08 AM
> To: 'nanog at merit.edu'
> Subject: FW: BGP keepalive/holdtime at GigE exchange
>
> I am looking for operational BCP feedback on common practice for tweaking
> down BGP holdtime/keepalive across GigE exchange points, since a peer
> could go down on the other side of the GigE switch without a
> corresponding adjacency change seen on your BR.  The thought is
> to make down peers known as fast thru a GigE exchange as they would
> be over a POS private peer interface.
>
> The current defaults are pretty gross, and much worse than the
> ISIS hello and interface keepalive defaults of 10 seconds.
>
> IOS12.x: neighbor [ip-address | peer-group-name] timers keepalive holdtime
> holdtime: default 180 seconds
> keepalive: default 60 seconds
>
>
http://cco.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_r
> /iprprt2/1rdbgp.htm#xtocid8553
>
> JunOS 4.2:
> holdtime: default 90 seconds
> keepalive: default one third of holdtime
>
>
https://www.juniper.net/techpubs/software/junos42/swconfig-routing42/html/bg
> p-summary13.html#1015669
>
> Cheers,
> -Lane
>
> Lane Patterson <lane at equinix.com>
> Equinix, Inc.
>

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