RE: Merge 2 MPLS Network

From: ebay_products_at_hotmail.com
To: bmcgahan_at_ine.com; ccielab_at_groupstudy.com
Subject: RE: Merge 2 MPLS Network
Date: Thu, 28 Mar 2013 15:47:57 -0700

We will be using 1 router (at this site) with 2 interfaces - One interface
connected to provider A and the other interface connected to provider B. The
site is not running any IGP. We are just doing Layer 3 intervlan.
The configuration on this router is as simple as it can get:!router bgp 65511
no synchronization bgp log-neighbor-changes network 192.168.2.0 redistribute
connected neighbor 209.155.71.xx remote-as 152xx no auto-summary!
It looks like we are learning default route from provider A
ROUTER#show ip route | i 0.0.0.0Gateway of last resort is 209.155.71.xx to
network 0.0.0.0 10.0.0.0/8 is variably subnetted, 127 subnets, 9 masksB*
0.0.0.0/0 [20/0] via 209.155.71.xx, 3w5d
If we get a neighbor and AS from provider B, I am not sure how will this
router know where to send the packets to?
!router bgp 65511 no synchronization bgp log-neighbor-changes network
192.168.2.0 redistribute connected neighbor 209.155.71.xx remote-as 152xx
neighbor 201.123.82.yy remote-as 142xx no auto-summary!
-yuri
> From: bmcgahan_at_ine.com
> To: ebay_products_at_hotmail.com; ccielab_at_groupstudy.com
> Date: Wed, 27 Mar 2013 22:11:07 -0500
> Subject: RE: Merge 2 MPLS Network
>
> Thanks, I'm a big fan of INE too ;)
>
> With your diagram, yeah that works fine. Just remember that if this router
or
> one of its circuits goes down then you're SoL with connectivity between A &
B.
> Since you're using BGP you may consider adding another router for
redundancy,
> as the policy control is a lot easier than using IGP.
>
> Brian McGahan, CCIE #8593 (R&S/SP/Security), CCDE #2013::13
> bmcgahan_at_INE.com<mailto:bmcgahan_at_INE.com>
>
> Internetwork Expert, Inc.
> http://www.INE.com<http://www.ine.com/>
>
> From: Cisco Fanatic [mailto:ebay_products_at_hotmail.com]
> Sent: Wednesday, March 27, 2013 8:21 PM
> To: Brian McGahan; ccielab_at_groupstudy.com
> Subject: RE: Merge 2 MPLS Network
>
> Thanks Brian. I am a big fan of INE and heard lot about you.
>
> Attached is the quick diagram. The brainstorming plan is that one of the
site
> will act as an NNI and as BGP is running on the NNI router, the routes will
be
> learned via BGP which will make the routing decision as where to send the
> packets to.
>
>
>
> > From: bmcgahan_at_ine.com<mailto:bmcgahan_at_ine.com>
> > To: ebay_products_at_hotmail.com<mailto:ebay_products_at_hotmail.com>;
> ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>
> > Date: Wed, 27 Mar 2013 19:47:53 -0500
> > Subject: RE: Merge 2 MPLS Network
> >
> > Did you already ask the providers if they'll run Inter-AS MPLS for you?
If
> they won't peer, and it's private L3VPN then there's not much you can do
other
> than multi-home a site both to A and B and redistribute the routes between
> them. All inter-provider traffic is going to route through the multi-homed
> site though, which will likely be your bottleneck and could be a single
point
> of failure. What's the current routing design look like?
> >
> > Brian McGahan, CCIE #8593 (R&S/SP/Security), CCDE #2013::13
> > bmcgahan_at_INE.com<mailto:bmcgahan_at_INE.com>
> >
> > Internetwork Expert, Inc.
> > http://www.INE.com
> >
> >
> > -----Original Message-----
> > From: nobody_at_groupstudy.com<mailto:nobody_at_groupstudy.com>
> [mailto:nobody_at_groupstudy.com] On Behalf Of Cisco Fanatic
> > Sent: Wednesday, March 27, 2013 6:04 PM
> > To: ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>
> > Subject: Merge 2 MPLS Network
> >
> > We currently have an MPLS network provided from vendor A and we are
moving
> to an MPLS network provided by vendor B.
> > For next 3 months till all other sites get FOC dates we have to utilize
MPLS
> network provided from vendor A. The only way around is to merge 2 networks
and
> start routing traffic on MPLS network provided by vendor B, till all sites
> eventually are on vendor's B network.
> > How can one merge 2 MPLS network?
> > -yuri
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
We will be using 1 router (at this site) with 2 interfaces - One interface connected to provider A and the other interface connected to provider B. The site is not running any IGP. We are just doing Layer 3 intervlan.

The configuration on this router is as simple as it can get:
!
router bgp 65511
 no synchronization
 bgp log-neighbor-changes
 network 192.168.2.0
 redistribute connected
 neighbor 209.155.71.xx remote-as 152xx
 no auto-summary
!

It looks like we are learning default route from provider A

ROUTER#show ip route | i 0.0.0.0
Gateway of last resort is 209.155.71.xx to network 0.0.0.0
     10.0.0.0/8 is variably subnetted, 127 subnets, 9 masks
B* 0.0.0.0/0 [20/0] via 209.155.71.xx, 3w5d

If we get a neighbor and AS from provider B, I am not sure how will this router know where to send the packets to?

!
router bgp 65511
 no synchronization
 bgp log-neighbor-changes
 network 192.168.2.0
 redistribute connected
 neighbor 209.155.71.xx remote-as 152xx
 neighbor 201.123.82.yy remote-as 142xx
 no auto-summary
!

-yuri

Blogs and organic groups at http://www.ccie.net
Received on Thu Mar 28 2013 - 15:50:04 ART