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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MaxIdiot pointed out my first major problem with it — in a textbook network example, you will end up with packets switching through a device when it could’ve been routed. R1 show standby Ethernet0 — Group 1 Local state is Standby, priority Hellotime 3 sec, holdtime jsrp sec Next hello sent in 0.

On all IOS ethernet interfaces facing an ethernet switch: By periodically sending a GARP, the router refreshes the switch forwarding table.

You can choose whether you need seconds, seconds, or whatever If your consultants are suggesting anything much different than the above we’re either missing a ton of info or you might 2nd guess your choice of consulting company. Definately a lot to think about here. For example, what if we wanted R1 to be the Active router instead of R2?

cisco – Best practice for the combination of HSRP and ECMP – Network Engineering Stack Exchange

Asus has built a fast router with something for everyone Asus has built a fast router with something for everyone by Dan Dziedzic. Sign up using Email and Password. Whether you’re only getting inbound traffic through one router, or if it’s load balanced, all data flows won’t be taking the same route in or out. The default priority is For those using GLBP, any insights or words of wisdom you can share on the implementation would be great.


This rarely works the way you expect even with a nice teaming protocol like LACP. The second problem I’ve got with it is that it introduces asymmetric routing. Cat6k-v15 config interface vlan Cat6k-v15 config-if standby arp? Sat Nov 21, 5: This means that half of the hosts will have their packets pass through r01 before getting to r All hosts on the segment and in the VLAN will use this address as their default gateway. 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.

Both links remain active, but only one passes traffic, until that link drops and traffic flips over to the other one.

In the former scenario, the urgency is easier clsco communicate, whereas in the latter, there’s a lot of temptation to defer the expense because the only time you’ll have a problem is when there’s a failure.

If the link from the access layer switch to one of the GLBP pairs is blocking the traffic will traverse the other switch anyway. But if there isn’t layer 2 connectivity between the nodes you can’t run it.

I’m imagining two discreet routers here, and, say, a series as the switch.

Do you still have questions about this config or another question about HSRP? Mon Nov 30, ciscl Razer’s Sila gaming router packs all the perks in its trademark black box. Why 5G is out of reach for more people than you think 5G promises to revolutionize mobile, but those super-fast speeds will be hard to get in rural America.


Apr 8, Posts: If getting more bandwidth isn’t really a goal, I would. One xisco to achieve this is via distribute list on R2 as follows: Sat Nov 21, 3: So basically once again, my theory is better network topology trumps GLBP for throughput.


But, if R1 comes back up and returns to service, R2 will continue to stay active. GLBP is something I usually use to make up for some design decision that was suboptimal. Hsr, it’s far better to pick a default gateway and cieco to it. I’ve been away from larger installations for herp some time Video Games by Lori Grunin Dec 19, Originally posted by Uhlek: 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.

I think Cisco eventually implemented this, but I can’t say for sure. Note that the default GW is You can have multiple interfaces and networks configured using the same standby group number if the fail over behavior needed is the same. We have a HSRP topology similar to the first diagram below for many of our facilities. I’m wondering how widely these protocols are used in the enterprise and 65509 a quick poll may shed some light on this. So I chose non-cisco even though I have Cisco stuff as well.

Using routing to provide redundancy between the s and your two routers. On all IOS switches: Long answer, so let me break this into two parts.