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Single FE Link for State/Link PIX Failover

 
 
Matthew Melbourne
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      01-09-2005
Are there any disadvantages to using the same physical FastEthernet link
for the LAN-based Failover "link status" and the stateful synchronisation
link on a fairly lightly loaded PIX 515E pair?

Is the issue the possibility of the LAN-based failover 'keepalives' not
arriving in a timely fashion if the traffic associated with stateful
replication starts to monopolise the link?

Cheers,

Matt

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Matthew Melbourne
 
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AJN
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      01-10-2005
Hi,

Indeed, it's possible to share the LAN-based failover interface with
statefull failover interface under lightly loaded configuration, but Cisco
recommend to use a dedicated LAN-based failover interface (with dedicated
switch) , because if all connectivity between PIX's is lost both could
become active.



Another advantage of the LAN-based failover is distance limitation, and the
weakness is the delayed detection of its peer power loss, consequently
causing a relatively longer period for failover to occur (intermediate
switches delays + cable delay).


 
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Alexander Apathy
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      01-10-2005
AJN wrote:
>
> Another advantage of the LAN-based failover is distance limitation, and the
> weakness is the delayed detection of its peer power loss, consequently
> causing a relatively longer period for failover to occur (intermediate
> switches delays + cable delay).
>

I could not experience any difference or delays in failover when using
dedicated LAN connections compared to serial failover-cable. At least
that is true when directly connecting PIX 525 or 535 over dedicated
66-MHz SX gigabit ethernet cards.

Cheers,
Alexander
 
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