User's Manual

Networking
VRRP
Cisco ISA500 Series Integrated Security Appliance Administrator Guide 139
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- IGMPv2: Leave messages are added to the protocol. This allows group
membership termination to be quickly reported to the routing protocol,
which is important for high-bandwidth multicast groups and/or subnets
with highly volatile group membership.
- IGMPv3: Major revision of the protocol. It allows hosts to specify the lists
of hosts from which they want to receive traffic. Traffic from other hosts
is blocked inside the network. It also allows hosts to block packets inside
the network that come from sources sending unwanted traffic.
• IGMP Snooping: You can use IGMP snooping in subnets that receive IGMP
queries from either IGMP or the IGMP snooping querier. Click On to enable
IGMP Snooping, or click Off to disable it.
STEP 3 Click Save to apply your settings.
VRRP
The Virtual Router Redundancy Protocol (VRRP) is a redundancy protocol for LAN
access device. VRRP configures a groups of routers (include a master router and
several backup routers) as a virtual router.
STEP 1 Click Networking -> VRRP.
The VRRP window opens.
STEP 2 Check the box of Enable Virutal Router Redundancy Protocol (VRRP) to enable
VRRP, or uncheck the box to disable it.
STEP 3 If you enable VRRP, enter the following information:
• Interface: The default interface of the master virtual router (your security
appliance).
• Source IP: The source IP address of the master virtual router.
NOTE If a VRRP router owns the IP address of the virtual router and the IP
address of the physical interface, this router will function as a master
virtual router .