- Green, 3000 points or more
Need assistance in solving this
particular issue and would greatly appretiate your help.
Nothing is broken but instead need to learn what obtions I have in following situation, not strong on bgp.
Couple of months ago we migrated all of our sites from PRN cloud to MPLS, same provider.
All sites are working fine, just started to assess traffic and would like to tweak and tuned things around gradually for the better. I noticed a particular problem that would like to get some help on how to, before we were completly OSPF but things had to change with MPLS.
Currenlt have three mayor sites, SITE_1, SITE_2 and SITE_3.
Site_1 have 3Megs to MPLS cloud -
Site_2 have 45Megs to MPLS cloud -
Site 3 have 45Megs to MPLS Cloud -
Between Site_1 and Site_2 I have 100MEGS Metro Ethernet link between 6500 switches.
I have serveral server subnets in Site_1 that are advertized in bgp say subnet 10.3.1.0/24, users from Site_3 that access servers in Site 1 they come through Site_1 3MB pipe,I also advertize in Site_2 bgp the same net 10.3.1.0/24 but because 10.3.1.0/24 has lower metric in OSPF SIte_1 than SITE_3 access to 10.3.1.0/24 through Site_1 is always prefered path for all my sites, how could I make Site_2 the prefered path for my sites to use Site_2-45MGS-->100MEGS--> towards Site_1 as prefered over the 3MEGs pipe. Would I be able to do this through bgp distance parameters. Our bgp distance parameters currently configured was recommended by our MPLS provider for intial connectivity during MPLS migration.
Site_1,Site_2, and Site_3 Edge Router bgp/ospf config attached.
Thank you for your assistance, anything you can provide that can point me to the right track.
>> Since it works the MPLS guys must be removing or something
yes, PE routers typically use neighbor x.x.x.x as-override
the effect of this is that remote VPN site will see the advertisement as sent by AS provider with a prepending:
Show ip bgp
Network Next Hop Metric LocPrf Weight Path
*> 10.3.1.0/24 184.108.40.206 0 209 209 i
and the prefix will pass the BGP loop avoidance rule.
This is very handy because in this way service provider can provision a private AS number to all sites of a customer.
And provides scalability too in the signaling plane.