Help Help!!

From: Hunt Lee (huntl@webcentral.com.au)
Date: Tue Sep 10 2002 - 03:26:32 GMT-3


Hello Group,

I'm trying to find out what happens when there are multiple distribute-lists
applied w/ distance vector Routing Protocols.

For "distribute-list <x> in", if global distribute lists & interface
distribute lists are used, then both must allow the network for it to be
allowed into the Routing Table:

access-list 3 permit 3.3.3.3 0.0.0.0
access-list 4 deny 3.0.0.0 0.255.255.255
access-list 4 permit any

distribute-list 3 <in> <Ethernet 0>
distribute-list 4 <in>

Even the interface distribute-list allows the 3.3.3.3 host route to be
coming in via the Ethernet 0 interface, but the global distribute-list denys
it. Is it true that the 3.3.3.3 will be deny??

For "distribute-list <x> out", the global distribute lists, interface
distribute lists & redistribution distribute lists are applied
independently.

e.g. access-list 3 permit 2.0.0.0 0.255.255.255
      access-list 4 permit 3.0.0.0 0.255.255.255
      access-list 5 permit any

distribute-list 3 out serial 0
distribute-list 4 out
distribute-list 5 out rip

...so in this case, network 2.x.x.x is allowed to go out via Serial 0,
network 3.x.x.x is allowed to go out via all interfaces (including Serial 0
Interface) + any 3.x.x.x network originated from any external protocol are
allowed to come in to the Routing table, while all networks are allowed to
go out to all RIP neighbors + any RIP networks are allowed to come in to the
Routing Table.

Any help will be greatly appreciated.

Best Regards,
H.



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