[j-nsp] Traffic balancing over LSPs

[Colby Barth]

The dest prefix needs to resolve over the LSP.  IGP short-cuts is an easy way to make that happen and should work for you but I see you tried that already and had some issue.  I would suggest trying to understand why igp shortcuts breaks something else.  

You can also use a rib-group on the LSP head-end to populate inet3 as needed.

-cb

On Jan 18, 2013, at 10:11 AM, James Ashton wrote:

> All, Just to clarify a few things,
> 
> The destination is not in inet.3.  I do not have a direct LSP to the destination and cannot create one (The destination doesn't support MPLS nor does it support BGP)
> 
> 
> 
> The show route output is:
> jashton at cr01-re0> show route xx.xxx.xx.x/24    
> 
> inet.0: 448173 destinations, 3298320 routes (445123 active, 39 holddown, 465440 hidden)
> @ = Routing Use Only, # = Forwarding Use Only
> + = Active Route, - = Last Active, * = Both
> 
> xx.xxx.xx.x/24     *[OSPF/150] 1d 12:35:24, metric 20, tag 0
>> to xx.xxx.xx.x via xe-4/2/0.0
>                    [BGP/170] 01:03:59, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via xe-5/2/0.0
>                    [BGP/170] 6d 19:17:07, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via ae3.0
>                    [BGP/170] 6d 18:57:09, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via ae2.0
>                    [BGP/170] 6d 19:03:11, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via ae2.0
>                    [BGP/170] 6d 19:02:45, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via ae2.0
>                    [BGP/170] 6d 19:18:02, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via xe-4/2/0.0
>                    [BGP/170] 6d 17:40:10, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via xe-5/2/0.0
>                    [BGP/170] 2d 13:54:44, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via ae6.0
>                    [BGP/170] 6d 19:20:12, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via xe-4/2/0.0
>                    [BGP/170] 6d 17:31:28, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via xe-5/2/0.0
>                    [BGP/170] 6d 17:40:12, MED 20, localpref 100, from xx.xxx.xx.x
>                      AS path: I
>> to xx.xxx.xx.x via xe-5/2/0.0
> 
> inet.3: 1232 destinations, 1248 routes (9 active, 0 holddown, 1232 hidden)
> 
> ----- Original Message -----
> From: "Colby Barth" <cbarth at juniper.net>
> To: "James Ashton" <james at gitflorida.com>
> Sent: Friday, January 18, 2013 9:31:51 AM
> Subject: Re: [j-nsp] Traffic balancing over LSPs
> 
> James-
> 
> Could you possibly send the output of 'show route x.x.x.x/y' for one of the destinations that you think should resolve over the LSP?
> 
> I suspect that this destinations are not in inet3 for some reason.
> 
> -Colby
> 
> On Jan 18, 2013, at 8:49 AM, Phil Bedard wrote:
> 
>> Is it all one OSPF area or is the CMTS in an area other than 0? If the
>> MX480 is an ABR you can restrict the OSPF routes and originate them on
>> the MX480 as BGP instead using aggregate statements.
>> 
>> Phil From: James Ashton
>> Sent: 1/17/2013 11:07
>> To: juniper-nsp at puck.nether.net
>> Subject: [j-nsp] Traffic balancing over LSPs
>> I have an interesting situation that has me stumped for the moment.
>> 
>> I have an OSPF speaking device (ARRIS CMTS) hanging off from an EX Switch.
>> That switch is uplinked to an MX480 which is part of the network core.
>> It has several paths into it from rest of the network.
>> From several major traffic centers in the network I have 3 LSPs
>> created to the MX480.
>> I am running "mpls traffic-engineering mpls-forwarding" throughout the network.
>> 
>> As the end users hanging off the CMTS are advertised onto the network
>> via OSPF, and I cannot terminate LSPs on the CMTS, the traffic to
>> these users is not being forwarded over the LSPs.
>> I have tested enabling "ospf traffic-engineering shortcuts" but that
>> is breaking several paths in the network to legacy areas with odd
>> configs.
>> 
>> My question is basically, how can I get this traffic into these LSPs
>> in way that is more manageable at scale than a pile of static routes.
>> 
>> 
>> I hope the above is clear,  I am low on Caffeine at the moment.
>> 
>> Thank you in  advance for any help/ideas.
>> 
>> James
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