HSRP vs VRRP

cisco_trooper

HSRP vs VRRP

Is there a significant difference between HSRP and VRRP? The seem to be almost the same to me. Am I missing something?

mikej412

VRRP is "standards based" (IETF) while HSRP is Cisco proprietary. Similiar, but they do not interoperate.

RFC 2281 - CISCO Hot Standby Router Protocol (HSRP)

RFC 3768 - Virtual Router Redundancy Protocol (VRRP)

cisco_trooper

Sheesh, you'd think I would catch on to something like that....

Thanks Mike.

Paul Boz

From a configuration standpoint I think HSRP is a bit easier to work with.

dtlokee

I like VRRP because you can use the same IP address that the interface already has as the virtual IP address where HSRP does not, you need to allocate an additional address. VRRP also already supports preemption (I know big deal, right?) where as HSRP needs it configured. Needing to cinfigure a tracked object instead of just specifying the interface to track is a bit more cumbersome though.

cisco_trooper

dtlokee wrote:

I like VRRP because you can use the same IP address that the interface already has as the virtual IP address where HSRP does not, you need to allocate an additional address. VRRP also already supports preemption (I know big deal, right?) where as HSRP needs it configured. Needing to cinfigure a tracked object instead of just specifying the interface to track is a bit more cumbersome though.

Yeah I noticed in an example they had the physical interface IP as the virtual address. I was used to seeing HSRP so I was thinking there was a mistake. Cool deal. Keeps you from wasting an IP.

CCIE_2011

well, there are some differences. e.g. they use different multicast mac and ip address, different default settings, different udp port, ... etc

But the more important are these :

1. In Vrrp all none-master routers in the group are in backup state. Whereas In HSRP, one router is active, on is standby and the rest rest are in listening state. this is if more than 3 routers are in the group.
2. The most important, VRRP have no tracking on interfaces as HSRP.
3. in vrrp, if a router uses virtual ip as an interface ip, this router becomes the active. If the priorities are default. In HSRP the highest interface address wins the election.


This was just a short list, And i'm sure there are some more differences.

dtlokee

CCIE_2011 wrote:

2. The most important, VRRP have no tracking on interfaces as HSRP.

Not really true, you can create a tracked object then use that in the vrrp configuration.

track 10 interface FastEthernet0/1 line-protocol

interface fa0/0
vrrp 1 ip 10.10.10.1
vrrp 1 track 10 decrement 50

CCIE_2011

dtlokee wrote:

CCIE_2011 wrote:

2. The most important, VRRP have no tracking on interfaces as HSRP.

Not really true, you can create a tracked object then use that in the vrrp configuration.

track 10 interface FastEthernet0/1 line-protocol

interface fa0/0
vrrp 1 ip 10.10.10.1
vrrp 1 track 10 decrement 50

My book didn't tell me this .... Thanks for the new information. Plus the correction

Paul Boz

I actually like having a separate IP for HSRP but I've never had IP constraints so I'm sure I'm partially jaded by that.

cisco_trooper

Paul Boz wrote:

I actually like having a separate IP for HSRP but I've never had IP constraints so I'm sure I'm partially jaded by that.

Heh. Try working for a multinational organization. We have several people who do NOTHING BUT keep track of and plan IP address assignments....

Paul Boz

I work for an ISP. Our IP assignments are pretty gruesome as well.

cisco_trooper

A Top Tier Wireless Carrier here....

Paul Boz

I'm glad that we mutually understand each other's pain

Paul Boz

I knew I'd read an article about this at some point..

http://tcpmag.com/qanda/article.asp?EditorialsID=306

[edit]

I apologize for the double post, I meant to edit my last one.

darkuser

hsrp cisco proprietary
vrrp standards based

Goldmember

cisco_trooper wrote:

A Top Tier Wireless Carrier here....

Telco's are know for their incompetence...

I bet you the guys who track and assign IP's all day probably screw that up! haha

Paul Boz

Goldmember wrote:

cisco_trooper wrote:

A Top Tier Wireless Carrier here....

Telco's are know for their incompetence...

I bet you the guys who track and assign IP's all day probably screw that up! haha

Talking out of your ass is more incompetent than any telco that I'm associated with.

cisco_trooper

Paul Boz wrote: »

Talking out of your ass is more incompetent than any telco that I'm associated with.

Yeah, this is old, BUT...

It's amazing to go back and look at some of your old posts and realize where you've been, how much you've learned, and how far you've come.

APA

Paul Boz wrote: »

Talking out of your ass is more incompetent than any telco that I'm associated with.

I was in major need of a laugh...... and you sir have now provided that!!!

Gold!

Grigsby

CCIE_2011 wrote: »

My book didn't tell me this .... Thanks for the new information. Plus the correction

For the BCMSN, every question that I have studied DID say that VRRP could NOT track interfaces. I knew that to be wrong because the IOS I was running on my 3550 did allow me to track an inteface using VRRP. However, every time I listed this an answer I scored it incorrectly, and this was the Cisco Press material.

cisco_trooper

Grigsby wrote: »

For the BCMSN, every question that I have studied DID say that VRRP could NOT track interfaces. I knew that to be wrong because the IOS I was running on my 3550 did allow me to track an inteface using VRRP. However, every time I listed this an answer I scored it incorrectly, and this was the Cisco Press material.

Look at the CCNP Prep Center. They have lab topologies and such in there for test preparation. They get pretty specific about the IOS versions so while you may know it to be possible on equipment you are used to working with, it is entirely possible that the IOS they list actually does NOT support the feature. Not saying that is the case here because I don't feel like looking up those IOS and going through the features, just saying we all need to keep that in mind when using devices that differ from what they recommend.

euphoria_009

Hi All,

I dont think there is a big difference b/e HSRP and VRRP. a small diff. is that in VRRP, a back up VRRP Router does not send advertisments.

Regards
Amit