[AusNOG] VPLS OSPF question

[Johann Lo]

I'll bite.

Ability to summarise per adjacency/interface i.e. exactly where you want it not just on an ABR. <--- BIG ONE in certain scenarios
Ability to designate spoke sites (instead of using stub/NSSA which is only possible if bordering area 0).
Smaller routing tables / overhead on spoke sites (no need for full LSA database of entire area). Though this is somewhat moot given current hardware, a lot of OSPF design literature seems to be 10 years old and assuming C2600-era capacity.
Ability to adjust or filter per neighbour metrics without the downsides of explicitly specifying OSPF NBMA mode (which incidentally eliminates DR/BDR so requires full mesh neighbour adjacencies, do you want 200 sites in a full neighbour mesh, er probably not).

Not saying EIGRP would necessarily be the best solution (but intuitively in an all cisco shop, if you're basically running a star topology then EIGRP stub makes great sense for all the little spoke sites).

All the guys suggesting really complex solutions, do you really think this is the right fit for the scenario described (ENTERPRISE environment).

Just my 2c

Johann Lo
Senior IP Network Engineer
Asian Pacific Telecommunications
p: 03 9863 9863
e: Johann.Lo at aptel.com.au




Notices - (1) If it appears that this email has been sent to you in error, please delete it (including any attachments) immediately and let the sender know by reply email. This email may contain confidential information and may be privileged. You may be acting unlawfully if you use, disclose, keep or rely upon that information. (2) This email and any attachment may not be free of viruses or defects. The sender is not liable for anything whatsoever including damage, loss and liability that you experience because you have received this email and notes that you should ensure that your IT system is properly safeguarded. (3) If this email is not sent in direct connection with the company's business, the company does not endorse the content.


-----Original Message-----
From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Mark Smith
Sent: Thursday, 18 April 2013 7:24 AM
To: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] VPLS OSPF question





----- Original Message -----
> From: Mark Smith <markzzzsmith at yahoo.com.au>
> To: "ausnog at lists.ausnog.net" <ausnog at lists.ausnog.net>
> Cc:
> Sent: Thursday, 18 April 2013 7:12 AM
> Subject: Re: [AusNOG] VPLS OSPF question
>
> So what are the advantages of EIGRP over OSPF or IS-IS, that make the
> trade off of using a proprietary protocol verses open ones worth accepting?
>
> IGRP had advantages over RIP, however, we now have OSPF and IS-IS.
> EIGRP had advantages when you were running multiple layer 3 protocols,
> such as IPX and Appletalk, but we're not any more. I understand that
> recent versions of EIGRP can concurrently support IPv4 and IPv6, but then so can IS-IS.
>

And OSPFv3 is gaining that capability too (https://tools.ietf.org/html/rfc5838)

>
> ----- Original Message -----
>>  From: Scott Weeks <surfer at mauigateway.com>
>>  To: ausnog at lists.ausnog.net
>>  Cc:
>>  Sent: Thursday, 18 April 2013 7:16 AM
>>  Subject: Re: [AusNOG] VPLS OSPF question
>>
>>
>>
>>  --- brad at bradpeczka.com wrote:
>>  From: Brad Peczka <brad at bradpeczka.com>
>>
>>  It should be pointed out that Cisco are currently in the process of
>> opening
> up
>>  EIGRP
>>  ----------------------------------------------
>>
>>  Note that they're not opening all of it up.  Some things, such  as
>> stub networks, are not going to be part of the opening up.
>>
>>  scott
>>
>>
>>
>>
>>
>>  _______________________________________________
>>  AusNOG mailing list
>>  AusNOG at lists.ausnog.net<mailto:AusNOG at lists.ausnog.net>
>>  http://lists.ausnog.net/mailman/listinfo/ausnog
>>
>>
>>  _______________________________________________
>>  AusNOG mailing list
>>  AusNOG at lists.ausnog.net<mailto:AusNOG at lists.ausnog.net>
>>  http://lists.ausnog.net/mailman/listinfo/ausnog
>>
>>  _______________________________________________
>>  AusNOG mailing list
>>  AusNOG at lists.ausnog.net
>>  http://lists.ausnog.net/mailman/listinfo/ausnog
>>
>>
>>  _______________________________________________
>>  AusNOG mailing list
>>  AusNOG at lists.ausnog.net
>>  http://lists.ausnog.net/mailman/listinfo/ausnog
>>
> _______________________________________________
> AusNOG mailing list
> AusNOG at lists.ausnog.net
> http://lists.ausnog.net/mailman/listinfo/ausnog
>
_______________________________________________
AusNOG mailing list
AusNOG at lists.ausnog.net
http://lists.ausnog.net/mailman/listinfo/ausnog

***********************************
This email has been scanned by Asian Pacific Telecommunications Hosted Security.
Powered by TrendMicro.
For more information please visit www.aptel.com.au
***********************************