What is VRRP and how it works?

What is VRRP and how it works?

VRRP is an IP routing redundancy protocol designed to allow for transparent failover at the first-hop IP router. VRRP enables a group of routers to form a single virtual router . The LAN clients can then be configured with the virtual router as their default gateway.

How do I set up VRRP?

Configure VRRP between R1 and R2 using the IP addresses 10.10….Table 3 – R2 Simple Example Configuration.

1 Enter privileged EXEC mode. R2>enable
4 Configure an IP address on the interface. R2(config-if)#ip address
5 Enter interface configuration mode. R2(config)#interface fa0/1

When would you use VRRP?

VRRP enables hosts on a LAN to make use of redundant routing platforms on that LAN without requiring more than the static configuration of a single default route on the hosts. The VRRP routing platforms share the IP address corresponding to the default route configured on the hosts.

How does VRRP communicate?

In VRRP operation, the master sends advertisements to the backup switches at regular intervals. The default interval is 1 second. If the backup switches do not receive an advertisement for a set period, the backup with the highest priority takes over as master within a few seconds and begins forwarding packets.

What architecture is used by VRRP solution?

VRRP is an open standard protocol, which is used to provide redundancy in a network. It is a network layer protocol (protocol number-112). The number of routers (group members) in a group acts as a virtual logical router which will be the default gateway of all the local hosts.

What is HSRP and VRRP in networking?

HSRP is a Cisco proprietary protocol. VRRP is an open standard protocol. HSRP is an application layer protocol. VRRP is a network layer protocol. HSRP version 1 uses UDP port number 1985 and multicast address 224.0.

Is VRRP a layer 3 protocol?

VRRP is an election protocol that dynamically assigns the Virtual IP to one of the routers of the VRRP Group. The Routers operate in a local area network. the Updates are not forwarded beyond the local subnet. Hence it is a layer-2 protocol.

What is VRRP in Cisco switch?

VRRP (Virtual Router Redundancy Protocol) is very similar to HSRP (Hot Standby Routing Protocol) and can be used to create a virtual gateway.

What IP address is used by VRRP solution?

When a PC attempts to access a server that is behind a VRRP router, the PC starts by ARPing for its gateway IP address, which is the VRRP virtual IP address. The VRRP master then replies with a MAC address of the form 00-00-5e-00-01-xx, where xx is the VRID in hexadecimal (for example 01 for VRRP instance 1).

What ports does VRRP use?

Hot Standby Router Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP)

HSRP version 1 uses UDP port number 1985 and multicast address and version 2 uses UDP port 1985 and as multicast address. VRRP uses multicast address and protocol number 112

Is VRRP better than HSRP?

As you can see there sin’t a big difference between the two protocols. The primary difference between HSRP versus VRRP would be that HSRP is proprietary to Cisco and can only be used on Cisco devices. VRRP is a standards based protocol and is vendor independent allow some flexibility when choosing network devices.


VRRP hello packets are neither TCP nor UDP. VRRP hello packets use IP protocol number 112 where TCP uses number 6, UDP uses number 11, and ICMP uses number 1. Wireshark can interpret and display, or dissect, VRRP hello packets.