Re: OSPF and ISIS in MPLS CORE ?

FYI, OSPF uses the Opaque LSAs to keep track of things like bandwidth
availability for priorities on interfaces. This is an example from the
command reference for "show ip ospf database."

Router# show ip ospf database opaque-area adv-router 192.168.1.12

OSPF Router with id(192.168.1.11) (Process ID 1)

                Type-10 Opaque Link Area Link States (Area 0)

LS age: 224
   Options: (No TOS-capability, DC)
   LS Type: Opaque Area Link
   Link State ID: 10.0.0.0
   Opaque Type: 1
   Opaque ID: 0
   Advertising Router: 192.168.1.12
   LS Seq Number: 80000081
   Checksum: 0xF659
   Length: 132
   Fragment number : 0
     MPLS TE router ID : 192.168.1.12
     Link connected to Point-to-Point network
       Link ID : 192.168.1.11
       Interface Address : 172.16.1.12
       Neighbor Address : 172.16.1.11
       Admin Metric : 10
       Maximum bandwidth : 193000
       Maximum reservable bandwidth : 125000
       Number of Priority : 8
       Priority 0 : 125000 Priority 1 : 125000
       Priority 2 : 125000 Priority 3 : 125000
       Priority 4 : 125000 Priority 5 : 125000
       Priority 6 : 125000 Priority 7 : 100000
       Affinity Bit : 0x0
     Number of Links : 1

On Thu, Jul 9, 2009 at 11:54 AM, Joe Rinehart <jjrinehart_at_hotmail.com>wrote:

> I personally loathe ISIS and only know of one SP that uses it for the MPLS
> core. When I worked for AT&T they used OSPF and you can mock up a lab that
> mimics that kind of set up...
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> srinivas pv
> Sent: Thursday, July 09, 2009 09:39
> To: jack daniels
> Cc: Cisco certification
> Subject: Re: OSPF and ISIS in MPLS CORE ?
>
> Hi,
>
> Yes. you can run EIGRP or any other routing protocol you want.
>
> But most of the Service providers use OSPF/ISIS
>
> Thanks,
> Srinivas
>
> On Thu, Jul 9, 2009 at 9:35 PM, jack daniels <jckdaniels12_at_gmail.com>
> wrote:
>
> > Hi All,
> >
> > We always see SP run in MPLS core OSPF or ISIS only why ?
> >
> > can we run EIGRP or any other protocol also.
> >
> > Thanks and Regards
> >
> >
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-- 
Bryan Bartik
CCIE #23707 (R&S), CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
Blogs and organic groups at http://www.ccie.net