Configuring VRRP on Dell Networking SmartFabric OS10

Table of Contents

• Overview
• Configuration Overview 
• Configuration Example
• Verification

Overview

VRRP allows multiple routers to provide an active/passive redundancy for a routable IP address in a broadcast domain.

• VIP - Virtual IP address
• VRRP Primary - Actively responds to the VIP
• VRRP Backup - Will become the primary if the advertisements from the active primary are no longer received and take over ownership of the VIP
• VRID - the Virtual Router Identifier that contains the vrrp-group

Configuration Overview

1. Configure the VRID and vrrp-group on either the physical or VLAN interface with an IP already assigned.
2. Configure the VIP
3. (Optional) - Configure the priority to influence the Primary Switch election.

NOTE:  If VRRP is configured in a Virtual Link Trunking (VLT) environment both switches act as active forwarders by default. Ensure that matching routing entries exist on each peer so that L3 reachability is the same.

To disable this behavior, run the following command on the VLAN interface of both peers:

OS10(conf-if-vl-10)# no vrrp mode active-active

Configuration Example

R1

R1# config

R1(config)# interface vlan 10

R1(conf-if-vl-10)# ip address 10.10.10.2/24

R1(conf-if-vl-10)# vrrp-group 10

R1(conf-vlan10-vrid-10)# virtual address 10.10.10.1

R1(conf-vlan10-vrid-10)# priority 200

R2

R2# config

R2(config)# interface vlan 10

R2(config-if-vl-10)# ip address 10.10.10.3/24

R2(conf-if-vl-10)# vrrp-group 10

R2(conf-vlan10-vrid10)# virtual address 10.10.10.1

R1(conf-vlan10-vrid-10)# priority 150

Verification

R1# show vrrp brief
Interface        Group   Priority   Prempt       State        Version    Primary addr(s)                  Virtual addr
---------------------------------------------------------------------------------------------------------------------
vlan10           IPv4 10   200       true      primary-state     2         10.10.10.2                      10.10.10.1

R2# show vrrp brief
Interface        Group   Priority   Prempt       State        Version    Primary addr(s)                  Virtual addr
---------------------------------------------------------------------------------------------------------------------
vlan10           IPv4 10   150       true      backup-state     2         10.10.10.2                      10.10.10.1 
 

show vrrp <vrrp-id>

R1# show vrrp 10

Interface       : vlan10                                  IPv4 VRID            : 10
Version         : 2                                       State                : primary-state
Primary IP      : 10.10.10.1                              Primary IP            : 10.10.10.2
Virtual MAC     : 00:00:5e:00:01:0a                       Accept Mode          : true
Admin Priority  : 200                                     Operational Priority : 200
Advertise Interval(in secs)       : 1
Preempt Status  : true                                    Hold Time            : 0
Virtual IP address :
10.10.10.1
primary-transitions        : 0                             advertise-rcvd            : 8
advertise-interval-errors : 0                             ip-ttl-errors             : 0
priority-zero-pkts-rcvd   : 0                             priority-zero-pkts-sent   : 0
invalid-type-pkts-rcvd    : 0                             address-list-errors       : 0


R2# show vrrp 10

Interface       : vlan10                                  IPv4 VRID            : 10
Version         : 2                                       State                : backup-state
Primary IP      : 10.10.10.1                              Primary IP            : 10.10.10.2
Virtual MAC     : 00:00:5e:00:01:0a                       Accept Mode          : true
Admin Priority  : 150                                     Operational Priority : 150
Advertise Interval(in secs)       : 1
Preempt Status  : true                                    Hold Time            : 0
Virtual IP address :
10.10.10.1
primary-transitions        : 0                             advertise-rcvd            : 228
advertise-interval-errors : 0                             ip-ttl-errors             : 0
priority-zero-pkts-rcvd   : 0                             priority-zero-pkts-sent   : 0
invalid-type-pkts-rcvd    : 0                             address-list-errors       : 0