[ROUTING] Settle a pointless debate - more commonly used routing protocol in total deployments - OSPF vs IS-IS
Hi, First time poster looking for some input on a debate and I apologise if I've done this completely wrong, but I don't think my colleague will be convinced until he hears it from this community. Granted I'm relatively green when it comes to networking, but it was my understand that other than BGP, the most widely used/implemented IGP would be OSPF. However, my colleague insists that I'm 100 percent wrong and that is IS-IS. I want to be clear, I'm not debating which protocol is better or worse, as they both have their strengths and weaknesses and ultimately it comes down to several factors based on a particular use-case on which routing protocol is the best way forward for a network. However in saying that, I believe that, when it comes to sheer numbers of where an IGP is implemented, OSPF is far more widely used in the world today, whether it be in small to medium to large businesses, Enterprise networks and even Service Provider networks (where as per my understanding, is where IS-IS really shines) I understand that this isn't really quantifiable, but I would like to get the opinions/experiences from this list and see what the outcome of this question is out of sheer curiosity. Thanks! Steve
You’re probably right that there a lot more in service devices that are running OSPF. But IS-IS assuredly is involved in routing way more traffic volume. In the end , right tool for the job is all that matters. On Fri, Jan 25, 2019 at 09:17 Steven Bahnsen <sbahnsen20@gmail.com> wrote:
Hi,
First time poster looking for some input on a debate and I apologise if I've done this completely wrong, but I don't think my colleague will be convinced until he hears it from this community.
Granted I'm relatively green when it comes to networking, but it was my understand that other than BGP, the most widely used/implemented IGP would be OSPF. However, my colleague insists that I'm 100 percent wrong and that is IS-IS.
I want to be clear, I'm not debating which protocol is better or worse, as they both have their strengths and weaknesses and ultimately it comes down to several factors based on a particular use-case on which routing protocol is the best way forward for a network.
However in saying that, I believe that, when it comes to sheer numbers of where an IGP is implemented, OSPF is far more widely used in the world today, whether it be in small to medium to large businesses, Enterprise networks and even Service Provider networks (where as per my understanding, is where IS-IS really shines)
I understand that this isn't really quantifiable, but I would like to get the opinions/experiences from this list and see what the outcome of this question is out of sheer curiosity.
Thanks!
Steve
On 25/01/2019 04:47, Steven Bahnsen wrote:
First time poster looking for some input on a debate
This won't settle anything. You've just started the same old debate again, from the beginning. Again. :) There are almost certainly indexed threads of this mailing list with enough answers to this question to last a life time of arguments. (See also, c-nsp, probably j-nsp, UKNOF, etc.) -- Tom
Why would you want to settle a pointless debate? :) -mel beckman
On Jan 25, 2019, at 6:45 AM, Tom Hill <tom@ninjabadger.net> wrote:
On 25/01/2019 04:47, Steven Bahnsen wrote: First time poster looking for some input on a debate
This won't settle anything. You've just started the same old debate again, from the beginning. Again. :)
There are almost certainly indexed threads of this mailing list with enough answers to this question to last a life time of arguments. (See also, c-nsp, probably j-nsp, UKNOF, etc.)
-- Tom
I'm personally aware of dozens and dozens of OSPF deployments, but not aware of a single IS-IS deployment. This is among smaller consumer ISPs, with typically up to around 10K customers. I'm sure a big reason for this is that IS-IS support isn't all that common in the lower end routing gear often used by these providers. On Fri, Jan 25, 2019, 7:16 AM Steven Bahnsen <sbahnsen20@gmail.com wrote:
Hi,
First time poster looking for some input on a debate and I apologise if I've done this completely wrong, but I don't think my colleague will be convinced until he hears it from this community.
Granted I'm relatively green when it comes to networking, but it was my understand that other than BGP, the most widely used/implemented IGP would be OSPF. However, my colleague insists that I'm 100 percent wrong and that is IS-IS.
I want to be clear, I'm not debating which protocol is better or worse, as they both have their strengths and weaknesses and ultimately it comes down to several factors based on a particular use-case on which routing protocol is the best way forward for a network.
However in saying that, I believe that, when it comes to sheer numbers of where an IGP is implemented, OSPF is far more widely used in the world today, whether it be in small to medium to large businesses, Enterprise networks and even Service Provider networks (where as per my understanding, is where IS-IS really shines)
I understand that this isn't really quantifiable, but I would like to get the opinions/experiences from this list and see what the outcome of this question is out of sheer curiosity.
Thanks!
Steve
Q: why do we have to start this debate every other day? A: because i don't have time to start it every day On Fri, 25 Jan 2019 at 16:18, Steven Bahnsen <sbahnsen20@gmail.com> wrote:
Hi,
First time poster looking for some input on a debate and I apologise if I've done this completely wrong, but I don't think my colleague will be convinced until he hears it from this community.
Granted I'm relatively green when it comes to networking, but it was my understand that other than BGP, the most widely used/implemented IGP would be OSPF. However, my colleague insists that I'm 100 percent wrong and that is IS-IS.
I want to be clear, I'm not debating which protocol is better or worse, as they both have their strengths and weaknesses and ultimately it comes down to several factors based on a particular use-case on which routing protocol is the best way forward for a network.
However in saying that, I believe that, when it comes to sheer numbers of where an IGP is implemented, OSPF is far more widely used in the world today, whether it be in small to medium to large businesses, Enterprise networks and even Service Provider networks (where as per my understanding, is where IS-IS really shines)
I understand that this isn't really quantifiable, but I would like to get the opinions/experiences from this list and see what the outcome of this question is out of sheer curiosity.
Thanks!
Steve
-- ++ytti
In my isp network of ~50,000 subscribers, I run about (200) mpls p/pe nodes in one ospf area with dual rr cluster for mp-ibgp type mpls overlay services. seems fine to me. -Aaron
there's an old saying, is-is is deployed in few networks, just some of the world's largest ones. there might be a reason for that. personally, i prefer emacs. randy
Next thing we know someone is going to start pumping up EIGRP. On Fri, Jan 25, 2019 at 1:34 PM Randy Bush <randy@psg.com> wrote:
there's an old saying, is-is is deployed in few networks, just some of the world's largest ones. there might be a reason for that.
personally, i prefer emacs.
randy
Nah, statics everywhere. That way only I can fix it. ...sometimes... lol -Aaron -----Original Message----- From: NANOG [mailto:nanog-bounces@nanog.org] On Behalf Of Randy Bush Sent: Friday, January 25, 2019 12:41 PM To: Tom Beecher Cc: North American Network Operators' Group Subject: Re: [ROUTING] Settle a pointless debate - more commonly used routing protocol in total deployments - OSPF vs IS-IS
Next thing we know someone is going to start pumping up EIGRP.
there's an old saying, is-is is deployed in few networks, just some of the world's largest ones. there might be a reason for that.
personally, i prefer emacs.
idrp please randy
participants (8)
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Aaron Gould -
Forrest Christian (List Account) -
Mel Beckman -
Randy Bush -
Saku Ytti -
Steven Bahnsen -
Tom Beecher -
Tom Hill