Re: [c-nsp] changing from ospf to eigrp

2008-04-14 Thread Asbjorn Hojmark - Lists
 Not, but it does mean those SPs should carefully consider the
 features that they do and don't get when buying enterprise
 gear.

 Like in we promise you this gear will do IPv6 in the future.

Hehe, yes something like that.

But seriously, if SPs weren't buying the enterprise gear (3560
and 3750) and were insisting on IPv6 on SP gear (ME-3400), I'm
very confident it would be there too. It really is very simple:
If a feature really moves more boxes, we will get that feature.
(Of cause, buying 10K boxes makes a much bigger impression than
buying 10).

-A

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Re: [c-nsp] changing from ospf to eigrp

2008-04-12 Thread Asbjorn Hojmark - Lists
 This is C-NSP, right? The 3750 is built for enterprises and,
 in my opinion, the DSBU is very customer-focused, when it
 comes to enterprise-requested features.

 It may be built for enterprises, but that doesn't mean it's
 not very useful for SPs too.

Not, but it does mean those SPs should carefully consider the
features that they do and don't get when buying enterprise gear.
That was my point.

-A

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Re: [c-nsp] changing from ospf to eigrp

2008-04-12 Thread Asbjorn Hojmark - Lists
 Business reasons - Cisco knows they can get away with 
 charging more for equipment which can switch packets in
 hardware and run IS-IS, so they do.

The ME 3400 is actually cheaper than the 3750 and does ISIS.
(Yes, I know it a somewhat limited version of ISIS, bu still)

-A

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Re: [c-nsp] changing from ospf to eigrp

2008-04-12 Thread Gert Doering
Hi,

On Sat, Apr 12, 2008 at 02:46:31PM +0200, Asbjorn Hojmark - Lists wrote:
 Not, but it does mean those SPs should carefully consider the
 features that they do and don't get when buying enterprise gear.

Like in we promise you this gear will do IPv6 in the future.

gert
-- 
USENET is *not* the non-clickable part of WWW!
   //www.muc.de/~gert/
Gert Doering - Munich, Germany [EMAIL PROTECTED]
fax: +49-89-35655025[EMAIL PROTECTED]


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Re: [c-nsp] changing from ospf to eigrp

2008-04-11 Thread sthaug
 I always assumed that the 3750/3560 didn't do IS-IS because Cisco didnt' 
 want to engineer CLNS support into the ASICs used in them?

The IS-IS support has nothing to do with the ASICs, both IS-IS and OSPF
are done in software (the hardware just needs a suitable filter to punt
the interesting packets to up to the processor).

 Seems a bit odd to me, even more so that I guess in the next few years 
 we'll have significantly more people using IS-IS to make IPv6 nicer to 
 deal with?

Business reasons - Cisco knows they can get away with charging more for
equipment which can switch packets in hardware and run IS-IS, so they do.

Steinar Haug, Nethelp consulting, [EMAIL PROTECTED]
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Re: [c-nsp] changing from ospf to eigrp

2008-04-11 Thread Leif Sawyer
[EMAIL PROTECTED] writes in reply to:
 Adam Armstrong whom wrote:
 I always assumed that the 3750/3560 didn't do IS-IS because 
Cisco didn't want to engineer CLNS support into the ASICs
 used in them?
 
 The IS-IS support has nothing to do with the ASICs, both 
 IS-IS and OSPF are done in software (the hardware just needs 
 a suitable filter to punt the interesting packets to up to 
 the processor).

Having just gone through an EIGRP-OSPF-IS-IS migration, I can
tell you that the 3750 has no problems with IS-IS.

But, and here's the kicker:  METRO version only.  Sigh.

c3750me-i5-mz.122-25.SEG3.bin   is the code train we're using.

there doesn't appear to be IPv6 suppport in this one, although
IOS navigator says that   c3750me-i5k91-mz.122-44.SE1.bin
has it.   Haven't had a chance to play with it yet.



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Re: [c-nsp] changing from ospf to eigrp

2008-04-11 Thread Adam Armstrong
Leif Sawyer wrote:
 [EMAIL PROTECTED] writes in reply to:
   
 Adam Armstrong whom wrote:
 
 I always assumed that the 3750/3560 didn't do IS-IS because 
 Cisco didn't want to engineer CLNS support into the ASICs
 used in them?
   
 The IS-IS support has nothing to do with the ASICs, both 
 IS-IS and OSPF are done in software (the hardware just needs 
 a suitable filter to punt the interesting packets to up to 
 the processor).
 

 Having just gone through an EIGRP-OSPF-IS-IS migration, I can
 tell you that the 3750 has no problems with IS-IS.

 But, and here's the kicker:  METRO version only.  Sigh.
   
The 3750ME is a very different device to the 3750, which is almost 
identical to the 3560. Makes sense, no?

adam.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-08 Thread Gert Doering
Hi,

On Mon, Apr 07, 2008 at 05:34:18PM +0100, Adam Armstrong wrote:
 How's V6 on EIGRP? 

Never tried that.  When we rolled out IPv6, all that existed was OSPFv3
(actually, all there was was BGP and RIPng, but OSPFv3 came fairly soon),
so we've kind of stuck to that.

[..]
 We do ISIS for loopbacks/router links and BGP for all other prefixes.

Sounds like use ISIS for loopbacks/router links and BGP for all other
prefixes for IPv6 to me :-)

 Sadly the ISIS does lock us out of using some hardware properly (like 
 the 3750).

Yes, the wonders of Cisco BU decisions... (another BU than my usual source 
of joy, but nonetheless not overly customer-oriented either).

gert
-- 
USENET is *not* the non-clickable part of WWW!
   //www.muc.de/~gert/
Gert Doering - Munich, Germany [EMAIL PROTECTED]
fax: +49-89-35655025[EMAIL PROTECTED]


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Re: [c-nsp] changing from ospf to eigrp

2008-04-07 Thread Adam Armstrong

 Also, if you ever want to buy a non-Cisco router for your network, you 
 can't since you now run EIGRP.
 

 Which is a strong argument indeed.

 OTOH, EIGRP *is* a fairly nice protocol - easy to understand and debug,
 much nicer knobs to tweak for TE things (make this link bad for *this*
 prefix only), fairly fast convergence out of the box, etc.
   
How's V6 on EIGRP? (I know little about EIGRP, does it need a new 
version for V6 like OSPF? Does it exist?) Not having to dual IGP for V6 
is one of the main plus points of ISIS imo.

We do ISIS for loopbacks/router links and BGP for all other prefixes.

Sadly the ISIS does lock us out of using some hardware properly (like 
the 3750).

adam.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-07 Thread TJ
Is EIGRP multiprotocol?
Yes, and no.  

Cisco says yes mostly because ... well, just because it can route for IP,
IPv6, IPX, AppleTalk.
Some argue that point and insist that the fact that it runs as multiple
independent processes (protocol depended modules) means it is closer to a
ships in the night approach than the term multiprotocol tag implies.  Also
- EIGRP for IPv6 is not supported by Catalyst devices as of today, IIRC.



/TJ

 -Original Message-
 From: [EMAIL PROTECTED] [mailto:cisco-nsp-
 [EMAIL PROTECTED] On Behalf Of Adam Armstrong
 Sent: Monday, April 07, 2008 12:34 PM
 To: Gert Doering; cisco-nsp@puck.nether.net
 Subject: Re: [c-nsp] changing from ospf to eigrp
 
 
  Also, if you ever want to buy a non-Cisco router for your network,
 you
  can't since you now run EIGRP.
 
 
  Which is a strong argument indeed.
 
  OTOH, EIGRP *is* a fairly nice protocol - easy to understand and
 debug,
  much nicer knobs to tweak for TE things (make this link bad for
 *this*
  prefix only), fairly fast convergence out of the box, etc.
 
 How's V6 on EIGRP? (I know little about EIGRP, does it need a new
 version for V6 like OSPF? Does it exist?) Not having to dual IGP for V6
 is one of the main plus points of ISIS imo.
 
 We do ISIS for loopbacks/router links and BGP for all other prefixes.
 
 Sadly the ISIS does lock us out of using some hardware properly (like
 the 3750).
 
 adam.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-05 Thread Hank Nussbacher
 I would like to change our layer 3 switches from ospf to eirgrp.  Is
 there a way I can accomplish this on a live system without causing
 problems?  Can I run both at the same time?

You realize that if you ever want to run MPLS you need OSPF and not EIGRP. 
Also, if you ever want to buy a non-Cisco router for your network, you 
can't since you now run EIGRP.

But I'm sure you knew that already.

-Hank
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Re: [c-nsp] changing from ospf to eigrp

2008-04-05 Thread Diogo Montagner
I suggest to you the article Understanding Redistribution 
http://blog.internetworkexpert.com/2008/02/09/understanding-redistribution-part-i/


This article didn't explain the process of migration from OSPF to EIGRP but
it give to you many tips about redistribution scenary. This tips could be
very useful during your migration.

Best regards,
./diogo -montagner

On Sat, Apr 5, 2008 at 2:39 PM, Hank Nussbacher [EMAIL PROTECTED]
wrote:

  I would like to change our layer 3 switches from ospf to eirgrp.  Is
  there a way I can accomplish this on a live system without causing
  problems?  Can I run both at the same time?

 You realize that if you ever want to run MPLS you need OSPF and not EIGRP.
 Also, if you ever want to buy a non-Cisco router for your network, you
 can't since you now run EIGRP.

 But I'm sure you knew that already.

 -Hank
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-- 
./diogo -montagner
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Re: [c-nsp] changing from ospf to eigrp

2008-04-05 Thread Gert Doering
Hi,

On Sat, Apr 05, 2008 at 08:39:44PM +0300, Hank Nussbacher wrote:
  I would like to change our layer 3 switches from ospf to eirgrp.  Is
  there a way I can accomplish this on a live system without causing
  problems?  Can I run both at the same time?
 
 You realize that if you ever want to run MPLS you need OSPF and not EIGRP. 

Not quite correct.  As far as I understand, you need OSPF or ISIS for
MPLS *TE*, but for plain MPLS (to be used for MPLS L3 VPN or EoMPLS 
pseudowire or such), EIGRP will do just fine.

(Or if not, please don't tell my routers, because they are currently 
doing MPLS VPN and EoMPLS with EIGRP just fine, and I don't want them
to notice that this is impossible and stop doing so...)

 Also, if you ever want to buy a non-Cisco router for your network, you 
 can't since you now run EIGRP.

Which is a strong argument indeed.

OTOH, EIGRP *is* a fairly nice protocol - easy to understand and debug,
much nicer knobs to tweak for TE things (make this link bad for *this*
prefix only), fairly fast convergence out of the box, etc.

gert
-- 
USENET is *not* the non-clickable part of WWW!
   //www.muc.de/~gert/
Gert Doering - Munich, Germany [EMAIL PROTECTED]
fax: +49-89-35655025[EMAIL PROTECTED]


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[c-nsp] changing from ospf to eigrp

2008-04-04 Thread Dan Letkeman
Hello,

I would like to change our layer 3 switches from ospf to eirgrp.  Is
there a way I can accomplish this on a live system without causing
problems?  Can I run both at the same time?

Thanks,
Dan.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-04 Thread Jeff Cartier
Can I run both at the same time?
- You can run both at the same time.

I would like to change our layer 3 switches from ospf to eirgrp.  Is
there a way I can accomplish this on a live system without causing
problems?
- If you talking about redistribution between IGPs, then technically yes.  Just 
be very careful not to create a routing loop.  A strategy on how to do this 
will all depend on the size of your network and the complexity of the migration.

May I inquire as to why your moving from OSPF to EIGRP?

-Original Message-
From: [EMAIL PROTECTED] on behalf of Dan Letkeman
Sent: Fri 4/4/2008 7:48 PM
To: cisco-nsp@puck.nether.net
Subject: [c-nsp] changing from ospf to eigrp
 
Hello,

I would like to change our layer 3 switches from ospf to eirgrp.  Is
there a way I can accomplish this on a live system without causing
problems?  Can I run both at the same time?

Thanks,
Dan.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-04 Thread Dan Armstrong
We just went through years of pain and money to change from eigrp to 
ospf. :-)





Jeff Cartier wrote:
 Can I run both at the same time?
 - You can run both at the same time.

 I would like to change our layer 3 switches from ospf to eirgrp.  Is
 there a way I can accomplish this on a live system without causing
 problems?
 - If you talking about redistribution between IGPs, then technically yes.  
 Just be very careful not to create a routing loop.  A strategy on how to do 
 this will all depend on the size of your network and the complexity of the 
 migration.

 May I inquire as to why your moving from OSPF to EIGRP?

 -Original Message-
 From: [EMAIL PROTECTED] on behalf of Dan Letkeman
 Sent: Fri 4/4/2008 7:48 PM
 To: cisco-nsp@puck.nether.net
 Subject: [c-nsp] changing from ospf to eigrp
  
 Hello,

 I would like to change our layer 3 switches from ospf to eirgrp.  Is
 there a way I can accomplish this on a live system without causing
 problems?  Can I run both at the same time?

 Thanks,
 Dan.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-04 Thread Robert J. Huey

On Fri, 4 Apr 2008, Dan Letkeman wrote:

 Hello,

 I would like to change our layer 3 switches from ospf to eirgrp.  Is
 there a way I can accomplish this on a live system without causing
 problems?

Yes.  I've done the opposite without much grief but we still called a 
it flag day and did everything in one maintenance window.


 Can I run both at the same time?

YesBut keep in mind that EIGRP carries with it an administrative 
distance of only '5' whereas OSPF is at 110.You might consider moving
the adminstrative distance for EIGRP to something above OSPF across 
your network until everyhting is in both routing processes. Then kill off 
OSFP and move AD back to it's default values.

rgds,
   --r
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Re: [c-nsp] changing from ospf to eigrp

2008-04-04 Thread Jeremy Stretch
  Can I run both at the same time?

If you do, you may want to consider tweaking the administrative 
distances until EIGRP has been fully implemented across the network. 
Remember, by default EIGRP has an AD of 90 (internal) and OSPF of 110, 
so EIGRP-learned routes will be preferred. This has the potential to 
cause problems if EIGRP is misconfigured or only partially enabled 
during migration.

stretch
http://www.packetlife.net/

Dan Letkeman wrote:
 Hello,

 I would like to change our layer 3 switches from ospf to eirgrp.  Is
 there a way I can accomplish this on a live system without causing
 problems?  Can I run both at the same time?

 Thanks,
 Dan.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-04 Thread Whisper
On Sat, Apr 5, 2008 at 12:43 PM, Robert J. Huey [EMAIL PROTECTED] wrote:


 YesBut keep in mind that EIGRP carries with it an administrative
 distance of only '5' whereas OSPF is at 110.You might consider moving
 the adminstrative distance for EIGRP to something above OSPF across
 your network until everyhting is in both routing processes. Then kill off
 OSFP and move AD back to it's default values.

 rgds,
--r


EIGRP Summary Routes have an admin distance of 5 and have to be configured
manually on a per interface basis
Normal EIGRP Routes have an admin distance of 90
OSPF is admin distance is 110

My questions when doing this doing this would be.

1. How complicated is the network?
2. What better, rolling EIGRP in from the edges to the core, or out from the
core to the edges?

The beauty of moving from OSPF TO EIGRP is, in theory at least, the EIGRP
Routes will be prefered over the OSPF Routes when the administrative
distance is the deciding factor.

Cheers
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Re: [c-nsp] changing from ospf to eigrp

2008-04-04 Thread Whisper
So long as the OSPF network remains intact until the EIGRP network is up and
running, OSPF should effectively operate as a backup route in the cases
where EIGRP has no route, correct?

It'd it be like running a floating static route, except your using a dynamic
routing protocol, wouldn't it?

On Sat, Apr 5, 2008 at 10:52 AM, Jeremy Stretch [EMAIL PROTECTED]
wrote:

   Can I run both at the same time?

 If you do, you may want to consider tweaking the administrative
 distances until EIGRP has been fully implemented across the network.
 Remember, by default EIGRP has an AD of 90 (internal) and OSPF of 110,
 so EIGRP-learned routes will be preferred. This has the potential to
 cause problems if EIGRP is misconfigured or only partially enabled
 during migration.

 stretch
 http://www.packetlife.net/

 Dan Letkeman wrote:
  Hello,
 
  I would like to change our layer 3 switches from ospf to eirgrp.  Is
  there a way I can accomplish this on a live system without causing
  problems?  Can I run both at the same time?
 
  Thanks,
  Dan.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-04 Thread Ben Steele
What you are doing is known as ships in the night routing where you  
run multiple protocols that are unaware of each other, I would go  
ahead and deploy your EIGRP config while keeping your OSPF running and  
as someone else has mentioned the default admin distance for EIGRP is  
90 which will take precedence over your 110 OSPF, bare in mind if you  
use redistributed routes in EIGRP they will show up as admin distance  
of 170 though.

Either way just go from router to router deploying your EIGRP and then  
when your happy you've done all your devices go and check your route  
tables to see what OSPF routes are still showing up and then determine  
why, and if they are needed, as EIGRP obviously isn't seeing them (at  
least from a non redistributed PoV).

OSPF will pick up your slack while you deploy this in the above  
method, the only real danger I see is if you a) miss a router or b)  
fail to check the route tables for remaining OSPF routes after full  
EIGRP migration before turning OSPF off.

Ben

On 05/04/2008, at 12:30 PM, Whisper wrote:

 So long as the OSPF network remains intact until the EIGRP network  
 is up and
 running, OSPF should effectively operate as a backup route in the  
 cases
 where EIGRP has no route, correct?

 It'd it be like running a floating static route, except your using a  
 dynamic
 routing protocol, wouldn't it?

 On Sat, Apr 5, 2008 at 10:52 AM, Jeremy Stretch [EMAIL PROTECTED] 
 
 wrote:

 Can I run both at the same time?

 If you do, you may want to consider tweaking the administrative
 distances until EIGRP has been fully implemented across the network.
 Remember, by default EIGRP has an AD of 90 (internal) and OSPF of  
 110,
 so EIGRP-learned routes will be preferred. This has the potential to
 cause problems if EIGRP is misconfigured or only partially enabled
 during migration.

 stretch
 http://www.packetlife.net/

 Dan Letkeman wrote:
 Hello,

 I would like to change our layer 3 switches from ospf to eirgrp.  Is
 there a way I can accomplish this on a live system without causing
 problems?  Can I run both at the same time?

 Thanks,
 Dan.
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Re: [c-nsp] changing from ospf to eigrp

2008-04-04 Thread Ben Steele
Actually just to correct myself before anyone else decides to, I think  
ships in the night refers to using a different network protocol aswell  
as a different routing protocol working independently of each other,  
ie ipv6 with OSPF and ipv4 with EIGRP, either way you get my drift :)

On 05/04/2008, at 1:39 PM, Ben Steele wrote:

 What you are doing is known as ships in the night routing where you
 run multiple protocols that are unaware of each other, I would go
 ahead and deploy your EIGRP config while keeping your OSPF running and
 as someone else has mentioned the default admin distance for EIGRP is
 90 which will take precedence over your 110 OSPF, bare in mind if you
 use redistributed routes in EIGRP they will show up as admin distance
 of 170 though.

 Either way just go from router to router deploying your EIGRP and then
 when your happy you've done all your devices go and check your route
 tables to see what OSPF routes are still showing up and then determine
 why, and if they are needed, as EIGRP obviously isn't seeing them (at
 least from a non redistributed PoV).

 OSPF will pick up your slack while you deploy this in the above
 method, the only real danger I see is if you a) miss a router or b)
 fail to check the route tables for remaining OSPF routes after full
 EIGRP migration before turning OSPF off.

 Ben

 On 05/04/2008, at 12:30 PM, Whisper wrote:

 So long as the OSPF network remains intact until the EIGRP network
 is up and
 running, OSPF should effectively operate as a backup route in the
 cases
 where EIGRP has no route, correct?

 It'd it be like running a floating static route, except your using a
 dynamic
 routing protocol, wouldn't it?

 On Sat, Apr 5, 2008 at 10:52 AM, Jeremy Stretch [EMAIL PROTECTED]

 wrote:

 Can I run both at the same time?

 If you do, you may want to consider tweaking the administrative
 distances until EIGRP has been fully implemented across the network.
 Remember, by default EIGRP has an AD of 90 (internal) and OSPF of
 110,
 so EIGRP-learned routes will be preferred. This has the potential to
 cause problems if EIGRP is misconfigured or only partially enabled
 during migration.

 stretch
 http://www.packetlife.net/

 Dan Letkeman wrote:
 Hello,

 I would like to change our layer 3 switches from ospf to eirgrp.   
 Is
 there a way I can accomplish this on a live system without causing
 problems?  Can I run both at the same time?

 Thanks,
 Dan.
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