[j-nsp] Junos MPLS question

[Sorin CONSTANTINESCU]

On 12/12/05, Steven Wong <swong at juniper.net> wrote:
> Hi Piotr,

Hi,

R3 is an M7i router.

Regards,

>
> If I understand this correctly, the packets received by R3 are VPN
> traffic with 2 labels on the stack. Right ? What's the R3 router model ?
> Is this a T-series or M-series box ?
>
> Regards,
> Steven
>
> > -----Original Message-----
> > From: juniper-nsp-bounces at puck.nether.net
> > [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of
> > Sorin CONSTANTINESCU
> > Sent: Monday, December 12, 2005 2:55 AM
> > To: Piotr Marecki
> > Cc: juniper-nsp at puck.nether.net
> > Subject: Re: [j-nsp] Junos MPLS question
> >
> > On 12/11/05, Piotr Marecki <peter at mareccy.org> wrote:
> > > Ehlo ,
> > >
> >
> > Hi, Piotr,
> >
> > > Have you tried something like :
> > > hash-key {
> > >     family mpls {
> > >         label-1;
> > >         payload {
> > >             ip;
> > >         }
> > >     }
> > > }
> >
> > i just configured it.
> >
> > >
> > > under [forwarding-options] stanza as well as load-balancing
> > policy  in
> > > forwarding-table ? We have found , albeit
> > > in different scenario that such statements are necessary to
> > load-balance
> > > packets on mpls edge.
> > >
> >
> > I configured per-packet load-balancing, but i have the same problem:
> > traffic exits the mpls network out only one interface :(
> >
> > I want to mention that traffic that is not inside this VRF, but in
> > inet.0 is ballanced via R3&R4.
> >
> > >
> > > regards
> > >
> > > Piotr Marecki
> > >
> >
> > Thanks,
> >
> > >
> > > ----- Original Message -----
> > > From: "Sorin CONSTANTINESCU" <consta at gmail.com>
> > > To: <juniper-nsp at puck.nether.net>
> > > Sent: Sunday, December 11, 2005 5:39 PM
> > > Subject: [j-nsp] Junos MPLS question
> > >
> > >
> > > > Hi,
> > > >
> > > > I have a setup like this:
> > > >
> > > > R1 -> R2 -> R3 ->R4
> > > >
> > > > - R1,R2 and R3 are in an MPLS Domain. R4 is outside.
> > > > - between R3 and R4 are 4 links (load-balanced)
> > > > - R1 - Cisco
> > > > - R2, R3, R4 - Juniper
> > > >
> > > > The goal of this setup is to have traffic from R1 (inside
> > VRF) to go
> > > > to R4 ballanced on the 4 links between R3 and R4.
> > > >
> > > > I have configured a VRF in R1 and R3. In R3 i have a
> > static default
> > > > route to inet.0. Unfortunatelly, i cannot redistribute it
> > via MBGP to
> > > > R1, so i use 4 fake routes with qualified-next-hop, which are
> > > > redistributed in BGP. In R1, i route 0/0 towards the 4 next-hops
> > > > received earlier via MBGP.
> > > >
> > > > All is Ok, but sometimes i hit a bug on the cisco router,
> > and traffic
> > > > is no-more ballanced, and all traffic from R1 to R4 goes
> > only on one
> > > > link (instead of four).
> > > >
> > > > I tried routing one prefix (10.255.255.69, let's say) via 4
> > > > qualified-next-hops (assiociated with the 4 links). On R1, i have:
> > > >
> > > >   10.255.255.69/32 193.226.x.y nolabel/265056
> > > >                             193.226.x.y nolabel/265056
> > > >
> > > > On the R3, i have:
> > > >
> > > > === cut here ===
> > > > adonay at R3> show route label 265056
> > > >
> > > > mpls.0: 86 destinations, 86 routes (86 active, 0
> > holddown, 0 hidden)
> > > > + = Active Route, - = Last Active, * = Both
> > > >
> > > > 265056             *[VPN/170] 3d 14:49:40
> > > >                      to x.x.x.x via so-0/1/0.0, Pop
> > > >                      to x.x.x.x via so-0/1/1.0, Pop
> > > >                    > to x.x.x.x via so-0/1/2.0, Pop
> > > >                      to x.x.x.x via so-0/1/3.0, Pop
> > > >
> > > > adonay at R3>
> > > > === and here ===
> > > >
> > > > Although it looks very good, when tested, traffic is not
> > load-balanced
> > > > across the 4 links, but goes out one of them only.
> > > >
> > > >
> > > > Any help is greatly appreciated.
> > > >
> > > > Thanks.
> > > >
> > > > PS: I have opened a case with JTAC a few days ago, bot no
> > luck yet.
> > > > --
> > > > Sorin CONSTANTINESCU
> > > > JNCIS-M, CCNP
> > > > consta at gmail.com
> > > >
> > > > _______________________________________________
> > > > juniper-nsp mailing list juniper-nsp at puck.nether.net
> > > > http://puck.nether.net/mailman/listinfo/juniper-nsp
> > >
> > >
> >
> >
> > --
> > Sorin CONSTANTINESCU
> > JNCIS-M, CCNP
> > consta at gmail.com
> >
> > _______________________________________________
> > juniper-nsp mailing list juniper-nsp at puck.nether.net
> > http://puck.nether.net/mailman/listinfo/juniper-nsp
> >
>


--
Sorin CONSTANTINESCU
JNCIS-M, CCNP
consta at gmail.com