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тАО03-17-2008 07:13 AM
тАО03-17-2008 07:13 AM
OSPF
I have a number of vlans locally which i want distributed , when setting up the config have included them in the ospf area ie Vlan 2 - ip ospf area backbone etc . I also have routes to remote sites via an external MPLS network, when i look at the routes on my switches for example to a remote destination on the MPLS network, some switches show the route via the default vlan 1 ip others show it via the vlan 2 ip address. The show ip ospf neigbor command shows DR's and BDR's set up on different switches for different vlans, it all looks a bit of a mess.
What is the correct way to configure OSPF on a switch with multiple vlans that all require distributing around the network but only have all the communication and DR/BDR etc on one vlan, or is having DR/BDR on all the vlans normal.
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тАО03-17-2008 07:37 AM
тАО03-17-2008 07:37 AM
Re: OSPF
I just want to clarify one thing, do you have L2 MPLS or L3 one?
If you have L2, then you have to look again into your routes and the OSPF configuration.
If you have L3 MPLS, then what you should do is check if you have Traffic Engineering implemented somewhere forcing some traffic to exit via some Vlan.... etc.
Good Luck !!!
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тАО03-17-2008 08:06 AM
тАО03-17-2008 08:06 AM
Re: OSPF
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тАО03-18-2008 04:29 AM
тАО03-18-2008 04:29 AM
Re: OSPF
Depending on what switches you are using you have different options.
In general: only run OSPF on the VLAN that connects the sites for example the managment VLAN if you have multiple VLANs connecting the sites. To get the routes of attached networks advertised, do "redistribute connected" and the attached routes should show up. Another option would be to make the other interfaces "passive".
Let us know what switches you are using.
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тАО03-18-2008 05:58 AM
тАО03-18-2008 05:58 AM
Re: OSPF
I hope when i add this command it will resolve the problem.