06-01-2009 10:36 AM - edited 03-06-2019 06:02 AM
Hello,
I'm looking to setup layer 3 routing with ospf between 4 locations. Right now I would just like to get it up and running between 2 of the locations. I'd also like to have each location vlan'ed. I'd like to have excess traffic between the location minimized. The main location (Location 0 in the configs) is going to have a cisco 3750 stack of 2 switches. vlan 1 was already existing on the cisco stack when I inherited this network. I'd like to leave that in place for legacy equipment. I'd also like it if all the other vlans that get setup can still access equipment on that vlan. The satellite locations will be using HP 3400cl switches. The locations will be connected via 100mb fiber connections.
I've attached the parts of the hp/cisco switch configs that i'm concerned about. I'm fairly certain I haven't done this correctly. If anyone could point out my mistakes that would be great.
Thanks,
will
06-01-2009 11:04 AM
Hello William,
key point:
OSPF adjacencies can be built only on primary ip addresses.
the area-id , area type must match
hello time and dead interval must match.
OSPF router-ids must be different
in your case
/30 move in steps of 4 addresses
the l2 vlan tags must match if you are using an 802.1Q trunk.
if all this is correct it should work.
see
interface GigabitEthernet2/0/1
description Downlink from Location 1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 200
switchport mode trunk
!
this means vlan 200 is allowed and because native vlan1 on cisco side the frame have 802.1Q tag with vlan-id 200.
what is the meaning of the following:
vlan 200
name "location 0"
ip address 192.168.0.9 255.255.255.252
ip helper-address 10.20.0.x
>>>>tagged 2
exit
does it mean tagged with vlan-id 2 ?
Hope to help
Giuseppe
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