05-06-2003 12:53 AM - edited 03-09-2019 03:09 AM
Hi!
Is MSFC required if CatOS is run on the Supervisor?
According to docs FWSM runs its own routing and from FWSM point of view
MSFC is just an external router. Right? So, can external router be used instead
of MSFC?
Oleg Tipisov,
REDCENTER,
Moscow
05-06-2003 09:43 PM
YEs, you need an MSFC to run the FWSM. The FWSM and the MSFC create a secure VLAN interface (SVI) between themselves, this VLAN is used for the communication between the FWSM and the router. This is all done internally in the switch in conjunction with the Sup card, so all the modules have to be internal.
05-06-2003 11:06 PM
What this SVI is used for? For some control protocol or what?
So far as user traffic is concerned MSFC is clearly an option as
all the FWSM routing and forwarding doesn't depend on MSFC.
In my understanding SVI is needed to only exchange routing updates
between MSFC and FWSM. The SVI VLAN should be the only VLAN
common to both FWSM and MSFC unless CatOS 7.6 is used that
supports multiple SVIs.
BTW Prashanth Krishnappa's (LAN swithing forum) answer was that MSFC
is optional...
Oleg Tipisov,
REDCENTER,
Moscow
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