Re: OSPF and ISIS in MPLS CORE ?

Hi,

Thats great to hear , but out of curosity I want to know what basis you
decided to go for ISIS over any other protocol ( ospf).

Regards
J.Daniels

On Fri, Jul 10, 2009 at 11:07 AM, darth router <darklordrouter_at_gmail.com>wrote:

> IS-IS rocks! You can tune the shit out of it, it's light weight, fast,
> adjacencies processes are simple, you can run everything in the same area.
>
> I LOVE how you can peer into the PDU/LSP, and see what routes clns
> contains and hostname mappings, and you can run IPV6 in the same process.
>
> Once you get the hang of it ,and spend a bit of time working to understand
> CLNS concepts, it becomes a very robust protocol option. OSPF is commonly
> used, lots of 3rd party vendors will support it where they won't IS-IS, and
> most people know OSPF at least to a degree where they can get it working.
>
> I looked into using both and came to the conclusion for my needs IS-IS was
> the superior protocol in my ISP core.
>
>
> On Thu, Jul 9, 2009 at 11:33 AM, Bryan Bartik <bbartik_at_ipexpert.com>wrote:
>
>> 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
>> > >
>> > >
>> > > Blogs and organic groups at http://www.ccie.net
>> > >
>> > >
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>> >
>> >
>> >
>> >
>> >
>>
>>
>> --
>> Bryan Bartik
>> CCIE #23707 (R&S), CCNP
>> Sr. Support Engineer - IPexpert, Inc.
>> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
>>
>>
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>>
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Received on Fri Jul 10 2009 - 12:28:51 ART