Quick Reference Guide

570 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Basic IP parameters and defaults – Layer 3 Switches
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IP interface redundancy protocols
You can configure a Layer 3 Switch to back up an IP interface configured on another 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.
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 configure Layer 3 Switches and third-party routers to back up
IP interfaces on other Layer 3 Switches or third-party routers.
• Virtual Router Redundancy Protocol Extended (VRRPE) – An extension to standard VRRP that
adds additional features and overcomes limitations in standard VRRP. You can use VRRPE
only on Layer 3 Switches.
For configuration information, refer to the following:
• Virtual Router Redundancy Protocol Extended (VRRPE) – refer to Chapter 24, “Configuring
VRRP and VRRPE”.
• Virtual Router Redundancy Protocol (VRRP) – refer to Chapter 24, “Configuring VRRP and
VRRPE”.
Access Control Lists and IP access policies
Layer 3 Switches provide two mechanisms for filtering IP traffic:
• Access Control Lists (ACLs)
• IP access policies
Both methods allow you to filter packets based on Layer 3 and Layer 4 source and destination
information.
ACLs also provide great flexibility by providing the input to various other filtering mechanisms such
as route maps, which are used by BGP4.
IP access policies allow you to configure QoS based on sessions (Layer 4 traffic flows).
Only one of these filtering mechanisms can be enabled on a device at a time. Devices can store
forwarding information for both methods of filtering in the session table.
For configuration information, Chapter 13, “Configuring Rule-Based IP Access Control Lists”
Basic IP parameters and defaults – Layer 3 Switches
IP is enabled by default. The following IP-based protocols are all disabled by default:
• Routing protocols:
• Routing Information Protocol (RIP) – refer to Chapter 22, “Configuring RIP”
• Open Shortest Path First (OSPF) – refer to Chapter 23, “Configuring OSPF Version 2 (IPv4)”
• Multicast protocols:
• Internet Group Membership Protocol (IGMP) – refer to “Changing global IP multicast
parameters” on page 467