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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questions
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How does gratuitous ARP work?
Does gratuitous ARP work like a normal ARP request?
Why is gratuitous ARP used for HSRP?
- 1,428
18
votes
7
answers
13k
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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-...
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votes
7
answers
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What are the differences between VRRP and HSRP?
Are there any significant differences between VRRP and HSRP?
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10
votes
4
answers
5k
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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 ...
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1
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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(...
- 8,308
7
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0
answers
2k
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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:...
- 499
6
votes
1
answer
3k
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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 ...
- 333
6
votes
1
answer
2k
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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
...
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6
votes
1
answer
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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
2
answers
2k
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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 ...
- 93
5
votes
1
answer
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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 ...
- 4,389
5
votes
2
answers
7k
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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 ...
- 1,388
4
votes
1
answer
968
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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.
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votes
1
answer
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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 ...
- 782
4
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2
answers
6k
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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....
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votes
2
answers
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HSRP on Distribution Layer L3 Switches
I'm trying to configure HSRP on 2 L3 distribution layer switches and I'm confused as to what best practice is. I'm using Cisco's high availability campus guidelines and this is the topology I'm ...
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2
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Strange router's MAC address from ICMP Echo Reply?
Using Wireshark to capture ICMP packets (Windows) using ping to google.com, I can see the source-MACAddr of the ICMP Echo replies is not the same as the MAC address of my direct router (which is the ...
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3
votes
1
answer
696
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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?
[
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votes
1
answer
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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
...
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3
votes
1
answer
668
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HSRP on multilayer switch not working
I have this network topology in Packet Tracer, and i wanted to implement HSRP on both of the multilayer switches.
So what i made here is the switch on the left, both the laptop and the server are on ...
- 33
3
votes
1
answer
2k
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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 ...
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3
votes
1
answer
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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 ...
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votes
1
answer
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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 ...
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3
votes
1
answer
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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) ...
- 133
3
votes
1
answer
238
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Can a router be part of multiple HSRP groups?
Because we configure HSRP on interface level, is that possible?
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3
votes
1
answer
1k
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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 ...
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3
votes
1
answer
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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 ...
- 4,389
3
votes
1
answer
2k
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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 ...
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1
answer
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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 ...
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2
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1
answer
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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 ...
- 539
2
votes
1
answer
509
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HSRP switching active state but destination is unreachable
I've been working on a this network where I have 2 routers, Main router and failover router. both routers are connected to the main switch via fa0/0 which is divided into 3 sub interfaces, fa0/0.10, ...
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votes
1
answer
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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 ...
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votes
2
answers
2k
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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 ...
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votes
2
answers
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Will 2 redundant Routers configured with HSRP consume 3 IP Adresses in each Subnet?
The Problem occured while studying for my exams
Problem: I have to design a Network for a Company. The given IP Adress Space is 192.168.1.0/24 which has to be divided into 4 Subnets. These Subnets ...
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votes
1
answer
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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
1
answer
2k
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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 ...
- 4,389
2
votes
2
answers
1k
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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
1
answer
324
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Configuring HSRP on multiple L3 devices
I am currently doing an enterprise campus network which consist of Three Tier hierarchy and a simple MPLS design.
Currently, I'm stucked at HSRP configuration on the Core Layer to the Edge Router. ...
- 21
2
votes
1
answer
2k
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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 ...
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2
votes
1
answer
202
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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 ...
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1
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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 ...
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2
votes
2
answers
425
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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 ...
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2
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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 ...
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vote
1
answer
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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?
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2
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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 ...
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vote
2
answers
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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 ...
- 75
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vote
1
answer
551
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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?...
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1
vote
1
answer
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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 ...
- 149
1
vote
1
answer
263
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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 ...
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1
vote
1
answer
2k
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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 ...
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