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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There doesn’t even need to be HSRP, just if there are two routers it can bite you and cause even loops. No, just the two physical NICs with Intel teaming software. The two routers do each have their own physically and logically seperate WAN connection, so I feel that it’s appropriate to use GLBP between the 2 routers and core switches since they are actual gateways.

Something has to be blocking if your links between distribution switches is a trunk.

Cisco HSRP 工程实例介绍 一-思科技术CTO博客

So basically once again, my theory is better network topology trumps GLBP for throughput. To solve this problem, we can configure HSRP to be load balanced between routers.

The Western Digital Elements has rarely been this cheap. R1 show standby Ethernet0 — Group 1 Local state is Standby, priority Hellotime 3 sec, holdtime 10 sec Next hello sent in 0. One last note on HSRP standby groups.

However, when the router forwards a datagram to the host, it uses the physical MAC address. Tue Dec 01, I’m wondering how widely these protocols are used in the enterprise and thought a quick poll may shed some light on this.


Would your server have multiple virtual interfaces with gateways defined? Assume the iSCSI session starts at 8: Sat Nov 21, 5: So I chose non-cisco even though I have Cisco stuff as well. We picked a prime number to minimize the overlap of the timers. Sat Nov 21, 6: Long answer, so let me break this into two parts. Weylin Piegorsch 11 3.

Here again is our two router topology, with the preempt command added. Mobile by Morgan Little Oct 26, However, there is a configuration parameter that allows you to choose the number of GARPs including “infinite” and the interval. User VLANs are addressed at their servicing aggregation switch with currently no failover. Also, it’s really dead simple to implement. I’m imagining two discreet routers here, and, say, a series as the switch.

Troubleshooting HSRP

Why do people keep posting questions and then answering them, themselves? Where’s the point in that?

MaxIdiot pointed out my first major problem with it — in a textbook network example, ciscp will end up with packets switching through a device when it could’ve been routed. Lower all interface ARP Timers This option works best if you have a decent-sized layer2 switched network, a reasonable number of ARP entries and few routed interfaces.

CompactFlash Card, expansion slot. This rarely works the way you expect even with a nice teaming protocol like LACP. Storage by Rick Broida Nov 12, For this scenario we will use a topology consisting of just two routers. Email Required, but never shown. 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.


This could create a false impression that it’s a host issue rather than a network issue, and potentially drag out troubleshooting longer than it otherwise would take. But the layer 3 switch scenario strikes me as the point of the thread and more real world typical.

Note though that this depends on your hardware and software combination, not all HSRP implementations offer this. You can’t have both. For those using GLBP, any insights or words of wisdom you can share on the implementation would be great. The core switches currently statically route all of the outgoing traffic to router 1.

This will result in the WAN forwarding all traffic for All very interesting feedback guys. Cat6k-v15 config interface vlan Cat6k-v15 config-if standby arp? HSRP and tracking will take care of the egress traffic. Your hosts are going to be randomly using r01 or r02 to route out yes, I 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.

If your consultants are suggesting anything much different than the above we’re either missing a ton of info or you herp 2nd guess your choice of consulting company. The obvious disadvantage is that this doesn’t scale well if you have lots of ARP entries