All these protocols provide routes to the IP route table. You can use one or more of these protocols, in any combination. The protocols
are disabled by default.
IP multicast protocols
Brocade Layer 3 switches also support the following Internet Group Membership Protocol (IGMP) based IP multicast protocols:
• Protocol Independent Multicast - Dense mode (PIM-DM)
• Protocol Independent Multicast - Sparse mode (PIM-SM)
For conguration information, refer to "IP Multicast Protocols" in the FastIron Ethernet Switch IP Multicast Conguration Guide.
NOTE
Brocade Layer 3 switches support IGMP and can forward IP multicast packets. Refer to the "IP Multicast Trac Reduction"
chapter in the FastIron Ethernet Switch IP Multicast Conguration Guide.
IP interface redundancy protocols
You can congure a Brocade Layer 3 switch to back up an IP interface congured on another Brocade Layer 3 switch. If the link for the
backed up interface becomes unavailable, the other Layer 3 switch can continue service for the interface. This feature is especially useful
for providing a backup to a network default gateway.
Brocade Layer 3 switches support the following IP interface redundancy protocols:
• Virtual Router Redundancy Protocol (VRRP) - A standard router redundancy protocol based on RFC 2338. You can use VRRP
to congure Brocade Layer 3 switches and third-party routers to back up IP interfaces on other Brocade Layer 3 switches or
third-party routers.
• Virtual Router Redundancy Protocol Extended (VRRP-E) - A Brocade extension to standard VRRP that adds additional features
and overcomes limitations in standard VRRP. You can use VRRP-E only on Brocade Layer 3 switches.
ACLs and IP access policies
Brocade Layer 3 switches provide two mechanisms for ltering IP trac:
• Access Control Lists (ACLs)
• IP access policies
Both methods allow you to lter packets based on Layer 3 and Layer 4 source and destination information.
ACLs also provide great exibility by providing the input to various other ltering mechanisms such as route maps, which are used by
BGP4.
IP access policies allow you to congure QoS based on sessions (Layer 4 trac ows).
Only one of these ltering mechanisms can be enabled on a Brocade device at a time. Brocade devices can store forwarding information
for both methods of ltering in the session table.
For conguration information, refer to the chapter "Rule-Based IP ACLs" in the FastIron Ethernet Switch Security Conguration Guide .
IP conguration overview
FastIron Ethernet Switch Layer 3 Routing
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