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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Networking by Lori Grunin Oct 3, With GLBP, half hosts will be sending outbound packets to r01 to route out, and the other half will be sending them to r02 to route out. There are a few limited scenarios where it could be useful, but most of the time, it’s a solution in search of a problem, as far as I’m cico.

Note though that this depends on your hardware and software combination, not all HSRP implementations offer this. North of Congress, South of Progress Registered: There doesn’t even need to be HSRP, just if there are two routers it can bite you and cause even loops. Your hosts are going to be randomly using r01 or r02 to route out yes, Hsgp know it’s not assigned randomly, but the end-state distribution of hosts using which router will seem to be randombut you have no way to match up that decision to inbound routing.

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cisco 6509 HSRP双机热备份配置

R1 show standby Ethernet0 — Group 1 Local state is Standby, priority Hellotime 3 sec, holdtime 10 sec Next hello sent in 0. This clsco that half of the hosts will have their packets pass through r01 before getting to r Stacking Cat 3k b.

To me, ECMP is the real issue here – so in addition to the above steps to limit unknown unicast flooding, you can also tune the route metrics toward the WAN so that R1 is preferred over R2 for the return traffic.

Lower all interface ARP Timers This option works best if you have ciscco decent-sized layer2 switched network, a reasonable number of ARP entries and few routed interfaces.

HSRP, GLBP and VRRP – Ars Technica OpenForum

May 8, Posts: For example, what if we wanted R1 to be the Active router instead of R2? Feb 8, Posts: Hello real routing protocols. Email Required, but never shown. 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 cisoc policies.


Originally posted by EricP: One way to achieve this is via distribute list on R2 as follows: Preempt forces a router to be active after recovering from a failure.

To solve this problem, we can configure HSRP to be load balanced between routers. Let’s say, for the purposes of this discussion, r01 is the root. RawCode Ars Praefectus Tribus: All hosts on the segment and in the VLAN will use this address as their ciscp gateway.

Cisco provides a icsco for use to control this by using the Preempt command. Assuming that’s your topology you can’t run GLBP across all of them since there isn’t layer 2 connectivity, it’s layer 3.

cisco HSRP双机热备份配置 | 落脚点

In my case, it’s to protect against a complete chassis failure, however slim the chances. Sun Nov 22, 6: Something has to be blocking if your links between distribution switches is a trunk. Be respectful, keep it civil and stay on topic. Why would my router be participating in STP as a root bridge? So basically once again, my theory is better network topology trumps GLBP for throughput.

You can’t have both. May 16, Posts: