04-22-2013 11:17 AM - edited 03-04-2019 07:41 PM
We are in the process of switching MPLS providers and I am looking for some advice on configuration at our head end. We need the head end router to run both MPLS networks at the same time and then we will switch our remote offices one at a time.
Here is my current BGP and EIGRP setup:
router eigrp 99
redistribute bgp 65000
network 10.0.0.0
default-metric 100000 200 255 1 1500
auto-summary
!
router bgp 65000
no synchronization
bgp log-neighbor-changes
bgp redistribute-internal
network 10.0.0.0
redistribute eigrp 99
neighbor 64.x.x.13 remote-as 15270
neighbor 64.x.x.13 version 4
neighbor 64.x.x.13 default-originate
no auto-summary
!
Can I just add another router bgp and redistribute in my eigrp? Example:
router eigrp 99
redistribute bgp 65000
redistribute bgp 65001
network 10.0.0.0
default-metric 100000 200 255 1 1500
auto-summary
!
router bgp 65000
no synchronization
bgp log-neighbor-changes
bgp redistribute-internal
network 10.0.0.0
redistribute eigrp 99
neighbor 64.x.x.13 remote-as 15270
neighbor 64.x.x.13 version 4
neighbor 64.x.x.13 default-originate
no auto-summary
!
router bgp 65001
no synchronization
bgp log-neighbor-changes
bgp redistribute-internal
network 10.0.0.0
redistribute eigrp 99
neighbor 12.x.x.65 remote-as 15270
neighbor 12.x.x.65 version 4
neighbor 12.x.x.65 default-originate
no auto-summary
!
Would this work or am I missing something.
Thanks for the help.
Jason
04-22-2013 12:44 PM
Hi Jason,
It is only possible to run one BGP process per router. If you need to connect to a second MPLS cloud using a different autonomous system number, you will need to use the "neighbor x.x.x.x local-as" command. Please refer to the following document for more information about the local-as feature:
http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00800949cd.shtml
Regards
04-23-2013 07:28 AM
Thanks for the info Harold. I had another thought. If I can use the same AS for both MPLS netowrks can I just add a neigheibor to my bgp?
Example:
router bgp 65000
no synchronization
bgp log-neighbor-changes
bgp redistribute-internal
network 10.0.0.0
redistribute eigrp 99
neighbor 64.x.x.13 remote-as 15270
neighbor 64.x.x.13 version 4
neighbor 64.x.x.13 default-originate
neighbor 12.x.x.60 remote-as 12345
neighbor 12.x.x.60 version 4
neighbor 12.x.x.60 default-originate
no auto-summary
!
Thanks,
Jason
04-23-2013 07:34 AM
That is correct. It would definitely be easier. But often time, the restriction on the ASN comes from the service provider themselves. If you can work with your servie provider to allow you to use the same ASN, it sound like a good idea.
Regards
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