I have been asked to investigate implementing HSRP on two routers. All the information I have collected states that the HSRP commands. This document provides a sample configuration for HSRP in Cisco Series switches for Siwtch A is active state of HSRP and Switch B is in standby state. How to Configure HSRP on a Cisco Router (with GSN3 lab) these routers could be multilayer switches such as a Cisco or as well.

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Would your server have multiple virtual interfaces with gateways defined? HSRP, as well as Virtual Route Redundancy Protocol VRRP are considered high-availability network services that allow gsrp almost immediate fail over to a secondary interface when the primary interface becomes unavailable.

Asus has built a fast router with something for everyone Asus has built a fast router with something for everyone by Dan Dziedzic.

Cisco First Hop Redundancy Protocols: Using our example above, this is how the commands would look. Hello real routing protocols. On all IOS ethernet interfaces facing an ethernet switch: Mon Nov 30, 8: Email Required, but never shown.

In this example above, ethernet0on Router 1 is active for standby group 1 and Router 2 is standby. I would post references to all these, but I don’t have a high-enough “reputation” on this site to post more than two URLs. For this scenario we will use a topology consisting of just two routers.

R2 config interface ethernet1 R2 config-if ip address Originally posted by Pervis: In this scenario, HSRP provides high network availability since it routes IP traffic without depending on a single router. The core 5609 currently statically route all of the outgoing traffic to router 1. Since you have no cisck of knowing at the router which host was given which gateway, you’ll have to have someone check the host’s ARP table to determine which true default gateway it’s using.

This rarely works the way you expect even with a nice teaming protocol like LACP.


Sign up or log in Sign up using Google. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. I neglected to include that in my answer So I chose non-cisco even though I have Cisco stuff as well.

I’ve never been a ciscco of tweaking timers. R2 config interface ethernet0 R2 config-if ip address I do think this type of thing is a superior topology, if you need higher reliability for host connections. You can further tune these metrics so the backup route to R2 is actually a feasible successor for faster failover.

Weylin Piegorsch 11 3. MC-LAG variants are hardware dependent. Yet the fact remains, that writing a Q and an immediate answer is explicitly encouraged. I’m referring to your basic Cisco textbook design where you have a multilayer switch.

Cisco HSRP 工程实例介绍 一-思科技术CTO博客

Discussion threads can be closed at any time at our discretion. This is a good opportunity to “do it right”, so any comments are cjsco. Secondary to my 2-part answer, I just realized the question is asking from the opposite direction: I’ve been doing a bit of reading on these three redundant routing protocols and am considering reconfiguring my Cisco core switches from HSRP to GLBP for one of my newer sites.

Here is how we accomplish this. There doesn’t even need to be HSRP, just if there are two routers it can bite you and cause even loops. Where’s the point in that?

Cisco 6509 HSRP 工程实例介绍 一

Keep in mind GLBP can actually be worse depending on your spanning-tree topology. Environmental Parameters Min Storage Temperature. Assume the iSCSI session starts at 8: However I think HSRP would better serve for running between the aggregation switches and the core switches since there’s no real need for load balancing there. The second problem Cizco got with it is that it introduces asymmetric routing.


To solve this problem, we can configure HSRP to be load balanced between routers. We picked a prime number to minimize the overlap of the timers. The side-effect of this is that CAM table entries linger for 4 hours after the PC is removed which can be either good or bad, depending on your PoV.

ServicePilot, HSRP VLAN network control solution on c Cisco

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. However if you need to have a different behavior, meaning different priority, preempt, etc. Or short answer, explain what you have now in more depth preferably with a Visio. By forcing host traffic to both R1 and R2 in this fashion, we would be sure that R2 would never age out the MAC addresses. It’s easier to get needed circuit upgrades when your primary circuit is nearly saturation than when you’ve got two circuits cksco both have plenty of room to grow and would only have a problem if one of them failed during peak hours.

If you are in a situation where you need to defer the expense and use the additional circuit capacity of your backup circuit, it’s still an option, but it forces decision makers to consciously pull the trigger to decide to trade redundancy for capacity, rather than give them the option of sitting on their hands and making that decision through inaction. Mon Nov 23, 2: This means that all packets egressing from the switch will first pass through r Router 2 is not on the network yet but will be as part 66509 this redesign, which is why I’m talking about using GLBP there.

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