01-15-2009 10:45 AM - edited 03-06-2019 03:27 AM
How many Vlans encapsulation dot1q does support an c2821 with 2 Gigabit Ethernet interfaces?
Thanks.
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01-15-2009 01:28 PM
Hello Mariano,
in a router each Vlan subif takes a row in the IDB = interface descriptor block.
the total of physical and logical interfaces on your router cannot be higher then the IDB size.
This number is dependent on platform and IOS version.
on a c2821 the IDB can be 512
I didn't find the number so you should be able to implement several subinterfaces on your router.
2821
900
see
I shouldn't go behind 20 subinterfaces per GE there are other factors to be considered like the size of the NIC MAC packet filter.
Hope to help
Giuseppe
01-15-2009 01:28 PM
Hello Mariano,
in a router each Vlan subif takes a row in the IDB = interface descriptor block.
the total of physical and logical interfaces on your router cannot be higher then the IDB size.
This number is dependent on platform and IOS version.
on a c2821 the IDB can be 512
I didn't find the number so you should be able to implement several subinterfaces on your router.
2821
900
see
I shouldn't go behind 20 subinterfaces per GE there are other factors to be considered like the size of the NIC MAC packet filter.
Hope to help
Giuseppe
01-16-2009 04:46 AM
Giuseppe, thank you very much. It is that i was needed.
Mariano.
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