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New Member

vlan-map slows down catalyst 3550-12G

I need to pass only traffic of IP, ARP and PPPoE protocols via Catalyst.

I've created the following configuration:

vlan access-map vmap1 10

action forward

match ip address ip1

vlan access-map vmap1 20

action forward

match mac address arp

vlan access-map vmap1 25

action forward

match mac address pppoe

vlan access-map vmap1 30

action forward

match mac address mac1


mac access-list extended arp

permit any any 0x806 0x0

mac access-list extended mac1

permit host 0000.0000.0001 host 0000.0000.0001

mac access-list extended pppoe

permit any any 0x8863 0x0

permit any any 0x8864 0x0


ip access-list extended ip1

permit ip any any


vlan filter vmap1 vlan-list 8

I'd applied this configuration to two Catalysts - 3550-24 and 3550-12G,

(both running IOS c3550-i5q3l2-mz.121-9.EA1c), and 3550-24 works fine !

However 3550-12G drops packets not only for filtered VLAN 8, but

for all others too, such slows down the whole traffic a lot, so I had to

disable filtering at all.

What should I do to solve this problem ?


Re: vlan-map slows down catalyst 3550-12G

If both of the switches are configured with this and only the 3550-12G is having the issues I would think that it is possibly an issue with the IOS and you probably need to go through the Bug Tool Kit and check your IOS/CAT OS.

New Member

Re: vlan-map slows down catalyst 3550-12G

The IOS versions on both switches are the same !