Questions tagged [hsrp]

For questions about the Cisco proprietary protocol called Host Standby Router Protocol (HSRP). For instance, if you have any configuration issues or problems setting up HSRP.

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39
votes
3answers
117k views

How does gratuitous ARP work?

Does gratuitous ARP work like a normal ARP request? Why is gratuitous ARP used for HSRP?
19
votes
7answers
12k views

Best practice for the combination of HSRP and ECMP

The combination of ECMP (or other causes of asymmetric paths) and HSRP is broken by default in Cisco IOS; the default behaviour with this design floods unicast traffic excessively. What is the best-...
16
votes
7answers
106k views

What are the differences between VRRP and HSRP?

Are there any significant differences between VRRP and HSRP?
10
votes
4answers
5k views

PIM-SM multicast and HSRP/VRRP

I need to set up a PC to listen in on a multicast (PIM-SM) data feed. The multicast sources and (anycast) Rendezvous point are behind a "HSRP/VRRP address" on the other side of a WAN link. (The ...
10
votes
1answer
4k views

Configuring HSRP on Nexus OS

How do you configure HSRP on a Nexus 7000 series switch? I know in IOS the commands are in the interface configuration, for example: switch-a#config t switch-a(config)#interface g1/0/1 switch-a(...
6
votes
1answer
3k views

HSRP and Static NAT behavior

May I have your opinion on the following matter? Configuration: Two 2911 routers. Doing HSRP on Wan and LAN side with 2 standby groups. Doing static NAT to internal servers. Added redundacy keyword ...
6
votes
1answer
222 views

Router Ethernet port ip no accessible from clients

I have this setup with a hybrid of equipment's from Cisco and Ubiquiti Edge routers and Vyos. My Cisco Nexus configured with HSRP with all the SVI's on 192.168.1.243 as the active on HSRP and SVI's ...
5
votes
2answers
2k views

HSRP + OSPF over tunnel interface

We have 3 sites over an MPLS. Each site has 2 x Cisco 2911's running HSRP. Each site has a tunnel interface from it's local site to the remote site over the MPLS. The tunnel interfaces are mirrored on ...
5
votes
1answer
1k views

Cisco HSRP CAM vs ARP timeout

Today we received email from our ISP saying they are performing maintenance on their network so if you have HSRP connectivity with them in that case you need to clear ARP table or reduce ARP timeout ...
5
votes
1answer
892 views

How to resolve a spanning tree issue on a server trunk port?

I am having a very strange spanning-tree issue with Cisco Nexus switches. My server is connected to the TOR switch with trunk configuration because we have multiple VLANs on the server. When I reboot ...
5
votes
2answers
6k views

Fortigate 100D Firewalls and HSRP

First, please see the attached network diagram to see what I am trying to do. On the 2 distribution switches, we run HSRP and have one Fortigate going to SW1 and the other going to SW2. Then we have ...
4
votes
1answer
738 views

How do routers with equal standby-group find each other?

Shure, they have to be connected directly do each other, but in configuration you just configure for which interface the virtual router should exist.
4
votes
2answers
5k views

SonicWALL HA w/ Dual WAN HSRP from two redundant switches

We're adding two SonicWALL NSA 2600 firewalls to our current setup. We currently get two WAN connections from two separate Cisco routers running on the same external subnet with what I believe is HSRP....
4
votes
0answers
569 views

HSRP IPv6 configuration

Looking at the Cisco documentation for HSRP IPv6 configuration I noticed the use of 'standby 1 ipv6 autoconfig'. interface FastEthernet0/0 no ip address duplex auto speed auto ipv6 address 2020:...
3
votes
1answer
606 views

Performing HSRP for routers

On the right side you can see 2 multilayer switches. With those two switches I want to enable HSRP for each WAN router. What has to be done in order to accomplish this? and why? [
3
votes
1answer
988 views

High Availability on Routers - HSRP, VRRP, GLBP

I have two MLS Connected to a Layer 2 Switch, Behind Layer 2 Switch there are some 5 hosts are there. MLS - A - Active Router IP Add - 192.168.1.10 MAC Add - 0000.aaaa.aaaa Priority - 200 VLAN 50 ...
3
votes
1answer
1k views

Connecting an SRX chassis cluster to redundant upstream WAN links

I've been tasked with migrating some Juniper SSG 140's in an active/passive cluster to an SRX 340 cluster. I'm very familiar with ScreenOS, but am still learning JunOS. Currently, we're connected to ...
3
votes
1answer
2k views

Configuring HSRPv2 (Dual Stack - IPv4 and IPv6)

I want to configure HSRPv2 dual stack on my core-switches. Information: Access1 is in VLAN 64, Acess2 in VLAN 65 and Access 3 in VLAN 66 I have configured SVIs for each VLAN (IPv4 and IPv6). in the ...
3
votes
1answer
2k views

VRRP Sharing Master Router's IP

This set of question stems from a part of the answer to this question: What are the differences between VRRP and HSRP? With HSRP, each interface must have an IP address that is separate from the ...
3
votes
1answer
280 views

HSRP causing switch CAM entries to expire

I have host which is connected to a switch. I need to establish a communication with a server which is not in my network. So I am using two routers(gateways) ,configured with HSRP, between my host and ...
3
votes
1answer
3k views

Cisco HSRP with redundant links

I am not sure how to configure HSRP in my scenario: I have 2 distribution 2950 switches, each connected to two core 3560 switches. Distribution switches work in VTP transparent mode and (for now) ...
3
votes
1answer
120 views

Can a router be part of multiple HSRP groups?

Because we configure HSRP on interface level, is that possible?
3
votes
1answer
329 views

High Availability for ISR 4431 IPSec VPNs

I have the following lab setup in GNS3. R1 & R2 are VPN endpoint at my datacenters and R3 is simulating a remote site. What i'm trying to accomplish is having one tunnel from R3 to the ...
3
votes
1answer
3k views

vPC with HSRP strange arp issue

I have following scenario with vPC and HSRP (version 1) configuration. I am seeing very strange issue, my host configured for bond + vlan and my bonding mode is active-backup, I have only VLAN 100 ...
3
votes
1answer
1k views

Does VRRP or HSRP work with 2 different upstream ISPs?

We setup two Cisco ASRs as edge routers, each with a connection to a unique upstream ISP. Both routers are advertising the same IPv4 /24 prefix to their ISP via BGP, and both are connected to the same ...
2
votes
1answer
211 views

How exactly does a router get elected as an Active router in HSRP?

I know the overview of HSRP and that election depends on priority. I also know that only active and standby routers send hello messages every 3 seconds. But when the routers are first configured with ...
2
votes
1answer
148 views

Breaking a stack switches (with SVIs as gateway) - using HSRP

I have a stack of 2x 3850 L3 Cisco switches. This stack has multiple SVIs created for several VLANs and is use mainly for distribution (inter-vlan routing). The problem with the stack is that I can't ...
2
votes
1answer
1k views

HSRP Tracking an Ip

In this lap, I can edit configuration on R1 and R2 only. I configured HSRP protocol in both 2 routers in e0/0. where R1 has priority 150 and another router (R2) has priority 100. and made a track 1 ...
2
votes
2answers
2k views

VRRP vs HSRP for load sharing

Do both VRRP and HSRP support load sharing across more than one virtual routers based on the grop number ? In using VLAN's does the group number (in load balancing) will remain same in case of both ...
2
votes
1answer
193 views

Is it possible to make a truly active\active L3 VRRP\HSRP configuration between two Nexus in a vPC

I'm an admin that is used to working with older Cisco gear, the Catalyst 6500 and the like. This is my first time diving into the world of nxOS. I'm trying to create a truly active\active ...
2
votes
1answer
816 views

Multiple HSRP group on same VLAN interface

I have Cisco Nexus 9k switch and following is my HSRP configured with vPC interface Vlan100 description *** Public_1 VLAN *** no shutdown mtu 9216 no autostate no ip redirects ip address ...
2
votes
2answers
1k views

Tying a static route to HSRP to only advertise when Active

Anyone aware of a way to tie a static route to HSRP, so that it is only advertised when the router is Active? I cannot think of any way to do this other than via an EEM script which looks at syslog ...
2
votes
1answer
2k views

Stack switch with HSRP for Gateway redundancy

We have ws-c3850-48t two switch in stack. and from Internet Provide ISP we have two fiber drops coming for redundancy. I want to configure HSRP for failover but i believe stack switch work like single ...
2
votes
1answer
1k views

Why ARP Cache clear when HSRP is already running

I have a scenario to discuss. There are three nodes that I am talking about. lets give those sites the name A, B and C. Site A and C has vendors routers installed. Vendor has no reachability for ...
2
votes
1answer
85 views

HSRP packet query (interface state TLV)

I am trying to understand the inner workings of HSRP. During a failover, on Wireshark I see "Interface State TLV". I get what is happening in the "Group State TLV", but during the interface state ...
2
votes
2answers
343 views

Can I use HSRP for router hardware redundancy?

I need solution for router hardware redundancy. Two routers 2900 series with same configuration, toward same ISP. If one fail second to do failover. Can HSRP do this? Can outside interfaces be set ...
1
vote
2answers
3k views

HSRP change priority didn't failover

I have HSRP running on two L3 switch and i change priority to higher but it didn't failover, why? SW1 interface Vlan30 description Internal_PrivateIP ip address 10.5.0.2 255.255.248.0 no ip ...
1
vote
1answer
814 views

How to change HSRP version 1 to 2 without downtime?

We have running HSRP in production but its running on version 1 now i want to change it to version 2 so is there a way to do without any downtime or disturb live traffic?
1
vote
2answers
639 views

HSRP limitations on Catalyst 3560

I have read all of the documentation so many times that I put myself into a headspin. Now the sentences I read don't make any sense. What exactly is the HSRP limitation on Cisco Catalyst 3560 ...
1
vote
2answers
145 views

change around 100 hsrp groups priority

i am planning to switch hsrp status from standby to active for around 100 vlan interfaces. The problem is that the group numbers are not matching the interface vlan number. for example there is int ...
1
vote
1answer
400 views

Multicast and HSRP

Does an HSRP VIP factor into the PIM designated router and IGMP querier election on a segment? Should they be located on the same interface or device? What would be the effects of having them separate?...
1
vote
1answer
31 views

Redundant routers (HSRP, GLBP, … ) with single T1 circuit

I have two sites connected by a T1 circuit. Currenlty I have only a single router on both ends, but I would like to add redundantcy, HSRP, GLBP, or simular in case a router fails (see picture). Is ...
1
vote
1answer
92 views

IPSec tunnel between 2 LANs using HSRP in each side

This is my first post here, so tell me if there's something I'm doing wrong. I'm currently working with another IT student on our end of degree project and we're building our network in PT. Our ...
1
vote
1answer
784 views

hsrp on both side of router

i tried to create a simple network topology to test the Hot standby router protocol gateway for "server2" and "server3", and the architecture is shown in the figure below. i would like to clarify ...
1
vote
1answer
179 views

HSRP - 2 separate Virtual Router for Distribution and WAN?

I've got 2 Core-Multilayer-Switches connected with each other with two cables (trunks). They are also connected with the distribution-switches (and each switch is connected with both core-switches). ...
1
vote
1answer
554 views

HSRP vs VRRP interface tracking

Was reading a Cisco presentation and there was that VRRP does not have a native interface tracking mechanism but it does have the ability to track objects. Such objects include also uplink statuses of ...
1
vote
1answer
188 views

WAN project requirements increasing

Okay so I was contracted to provide to design a new WAN topology for quite a large company in my country and designed them a fairly standard IPSec over DMVPN type design. So you can see the above ...
1
vote
2answers
1k views

Regarding traffic blackholing in case of vpc and hsrp

From the cisco docs i have: "vPC and HSRP/VRRP Object Tracking As Figure 67 suggests, it’s important not to use HSRP/VRRP link tracking in a vPC configuration. Assume HSRP/VRRP object tracking is ...
1
vote
1answer
4k views

HSRP issue both device active stats

Here is the Diagram. Ip address: ISP: [VIP]- 10.107.25.5 [R1] - 10.107.25.6 [R2] - 10.107.25.7 Me: [VIP] - 10.107.25.10 [SW1] - 10.107.25.11 [SW2] - 10.107.25.12 Configuration on port: SW1 ...
1
vote
1answer
1k views

HSRP and VRRP both routers active

I have two routers connected to a single switch and both have internet connections. I have configured HSRP and VRRP as follows, This is a test bench I'm using so that's why I'm using both. The HSRP is ...