Link to home
Create AccountLog in
Networking

Networking

--

Questions

--

Followers

Top Experts

Avatar of isltt
isltt

CONFIGURING HSRP with four CISCO 2811 routers
Hello to everyone,

I have the following configuration:
                                                                    _______
                                                                    |SWITCH|
                                                                    -----------
                                                                           |
                                                                           |
                                                    HSRP ADDRESS 172.16.3.4

            eth0/1   172.16.3.5/255.255.255.248            eth0/1     172.16.3.6/255.255.255.248
                      | CISCO2811_1 |                                                     | CISCO2811_2 |
            eth0/0   172.16.4.1/255.255.255.248            eth0/0     172.16.5.1/255.255.255.248
                                   |                                                                       |
                                   |                                                                       |
                                   |                                                                       |
                             ISP A                                                                 ISP B
                                   |                                                                       |
                                   |                                                                       |
                                   |                                                                       |
            eth0/0   172.16.4.2/255.255.255.248            eth0/0     172.16.5.2/255.255.255.248
                      | CISCO2811_3 |                                                     | CISCO2811_4 |
            eth0/1   172.16.6.2/255.255.255.248            eth0/1     172.16.6.3/255.255.255.248

                                                    HSRP ADDRESS 172.16.6.1
                                                                          |
                                                                    ___|____
                                                                    |SWITCH|
                                                                    -----------
CISCO2811_1
interface FastEthernet0/0
 description ISPA
 ip address 172.16.4.1 255.255.255.248
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description WAN1
 ip address 172.16.3.5 255.255.255.248
 duplex auto
 speed auto
 standby priority 110
 standby 1 ip 172.16.3.4
 standby 1 preempt

CISCO2811_2
interface FastEthernet0/0
 description ISPB
 ip address 172.16.5.1 255.255.255.248
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description WAN1
 ip address 172.16.3.6 255.255.255.248
 duplex auto
 speed auto
 standby 1 ip 172.16.3.4
 standby 1 priority 105
 standby 1 preempt

CISCO2811_3
interface FastEthernet0/0
 description ISPA
 ip address 172.16.4.2 255.255.255.248
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description WAN2
 ip address 172.16.6.2 255.255.255.248
 duplex auto
 speed auto
 standby 1 ip 172.16.6.1
 standby 1 priority 110
 standby 1 preempt

CISCO2811_4
interface FastEthernet0/0
 description ISPB
 ip address 172.16.5.2 255.255.255.248
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description WAN2
 ip address 172.16.6.3 255.255.255.248
 duplex auto
 speed auto
standby 1 ip 172.16.6.1
 standby 1 priority 105
 standby 1 preempt

All routers have the following configuration
router eigrp 1
      network 172.16.0.0

The issue here is that if I turn off CISCO2811_1 in first location the HSRP switches over properly to CISCO2811_2 but no communcation between WAN1 and WAN2 takes place. If I then switch off CISCO2811_3, CISCO2811_4 takes over HSRP address and everthing works fine.
Can anyone assist, am i missing something ?

Zero AI Policy

We believe in human intelligence. Our moderation policy strictly prohibits the use of LLM content in our Q&A threads.

Avatar of Les MooreLes Moore🇺🇸

I'm assuming that the ISP links are point-to-point.
What are you using for dynamic routing?
EIGRP? OSPF?
Avatar of Don JohnstonDon Johnston🇺🇸

It sounds like router 3 can't reach the 3.0 network and is not advertising that. When you turn off R1, is the 3.0 network in R1's routing table?

Also, you may want to configure object tracking.

http://www.cisco.com/en/US/products/hw/switches/ps5023/products_configuration_guide_chapter09186a00808c7369.html

That way when a path is lost, the active router will decrement it's priority letting the standby router take over.
Avatar of islttisltt

ASKER

The connection is actually a Private Line link between sites. We are using static routes on the routers...

Reward 1Reward 2Reward 3Reward 4Reward 5Reward 6

EARN REWARDS FOR ASKING, ANSWERING, AND MORE.

Earn free swag for participating on the platform.

Avatar of Don JohnstonDon Johnston🇺🇸

Ah... That explains it. With a static route, R3 will send traffic to the 3.0 network to R1. With R1 dead, you've got no path.  I was under the impression you were running EIGRP.
Avatar of islttisltt

ASKER

These are the routes on all of the routers

CISCO2811_1
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.3.1
ip route 172.16.6.0 255.255.255.248 172.16.4.2
ip route 172.16.22.0 255.255.255.0 172.16.4.2
ip route 192.168.0.0 255.255.255.0 172.16.3.1
ip route 192.168.2.0 255.255.255.0 172.16.4.2
ip route 192.168.8.0 255.255.255.0 172.16.4.2
ip route 192.168.40.0 255.255.255.0 172.16.4.2
ip route 192.168.50.0 255.255.255.0 172.16.4.2
ip route 192.168.60.0 255.255.255.0 172.16.4.2
ip route 192.168.70.0 255.255.255.0 172.16.4.2
ip route 192.168.75.0 255.255.255.0 172.16.4.2

CISCO2811_2

ip classless
ip route 0.0.0.0 0.0.0.0 172.16.3.1
ip route 172.16.6.0 255.255.255.248 172.16.5.2
ip route 172.16.22.0 255.255.255.0 172.16.5.2
ip route 192.168.0.0 255.255.255.0 172.16.3.1
ip route 192.168.2.0 255.255.255.0 172.16.5.2
ip route 192.168.8.0 255.255.255.0 172.16.5.2
ip route 192.168.40.0 255.255.255.0 172.16.5.2
ip route 192.168.50.0 255.255.255.0 172.16.5.2
ip route 192.168.60.0 255.255.255.0 172.16.5.2
ip route 192.168.70.0 255.255.255.0 172.16.5.2
ip route 192.168.75.0 255.255.255.0 172.16.5.2
!

CISCO2811_3
ip classless
ip route 0.0.0.0 0.0.0.0 172.16.5.1
ip route 172.16.3.0 255.255.255.248 172.16.5.1
ip route 172.16.22.0 255.255.255.0 172.16.6.4
ip route 192.168.0.0 255.255.255.0 172.16.5.1
ip route 192.168.2.0 255.255.255.0 172.16.6.4
ip route 192.168.8.0 255.255.255.0 172.16.6.4
ip route 192.168.40.0 255.255.255.0 172.16.6.4
ip route 192.168.50.0 255.255.255.0 172.16.6.4
ip route 192.168.60.0 255.255.255.0 172.16.6.4
ip route 192.168.70.0 255.255.255.0 172.16.6.4
ip route 192.168.75.0 255.255.255.0 172.16.6.4
!

CISCO2811_4

ip classless
ip route 0.0.0.0 0.0.0.0 172.16.4.1
ip route 172.16.3.0 255.255.255.248 172.16.4.1
ip route 172.16.22.0 255.255.255.0 172.16.6.4
ip route 192.168.0.0 255.255.255.0 172.16.4.1
ip route 192.168.2.0 255.255.255.0 172.16.6.4
ip route 192.168.8.0 255.255.255.0 172.16.6.4
ip route 192.168.40.0 255.255.255.0 172.16.6.4
ip route 192.168.50.0 255.255.255.0 172.16.6.4
ip route 192.168.60.0 255.255.255.0 172.16.6.4
ip route 192.168.70.0 255.255.255.0 172.16.6.4
ip route 192.168.75.0 255.255.255.0 172.16.6.4
Avatar of Don JohnstonDon Johnston🇺🇸

The problem (in this case) with static routes is that when you lose R1, R3 has no way to get to the 3.0 network. This why we use routing protocols. They're able to fail over when a neighboring router (or link) fails.
Free T-shirt

Get a FREE t-shirt when you ask your first question.

We believe in human intelligence. Our moderation policy strictly prohibits the use of LLM content in our Q&A threads.

SOLUTION
Avatar of Les MooreLes Moore🇺🇸

Link to home
membership
Log in or create a free account to see answer.
Signing up is free and takes 30 seconds. No credit card required.
Create Account
Avatar of islttisltt

ASKER

I got it working somewhat by entering the command

standby 1 track fastethernet0/0 on Routers1 and 2 and on 3 and 4...

The problem is that this assumes that the link actually fails where this may not be the case because each service provider plugs the router directly into the a switch (no serial 0 CSU/DSU to go down).

Question.....can i track an ip address....?
ASKER CERTIFIED SOLUTION
Avatar of Don JohnstonDon Johnston🇺🇸

Link to home
membership
Log in or create a free account to see answer.
Signing up is free and takes 30 seconds. No credit card required.
Create Account
Networking

Networking

--

Questions

--

Followers

Top Experts

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.