Overview; Ip Interfaces - Foundry Networks Switch and Router Installation And Configuration Manual

Foundry Switch and Router Installation and Configuration Guide
The rest of this chapter describes IP and how to configure it in more detail. Use the information in this chapter if
you need to change some of the IP parameters from their default values or you want to view configuration
information or statistics.

Overview

Foundry Networks Layer 2 Switches and Layer 3 Switches support Internet Protocol (IP) version 4. IP support on
Foundry Layer 2 Switches consists of basic services to support management access and access to a default
gateway. IP support on Foundry Layer 3 Switches includes all of the following, in addition to a highly configurable
implementation of basic IP services including Address Resolution Protocol (ARP), ICMP Router Discovery
Protocol (IRDP), and Reverse ARP (RARP):
• Route exchange protocols
• Routing Information Protocol (RIP)
• Open Shortest Path First (OSPF)
• Border Gateway Protocol version 4 (BGP4)
• Multicast protocols
• Internet Group Membership Protocol (IGMP)
• Protocol Independent Multicast Dense (PIM-DM)
• Protocol Independent Multicast Sparse (PIM-SM)
• Distance Vector Multicast Routing Protocol (DVMRP)
• Router redundancy protocols
• Virtual Router Redundancy Protocol Extended (VRRPE)
• Virtual Router Redundancy Protocol (VRRP)
• Foundry Standby Router Protocol (FSRP)

IP Interfaces

Foundry Layer 3 Switches and Layer 2 Switches allow you to configure IP addresses. On Layer 3 Switches, IP
addresses are associated with individual interfaces. On Layer 2 Switches, a single IP address serves as the
management access address for the entire device.
All Foundry Layer 3 Switches and Layer 2 Switches support configuration and display of IP address in classical
sub-net format (example: 192.168.1.1 255.255.255.0) and Classless Interdomain Routing (CIDR) format
(example: 192.168.1.1/24). You can use either format when configuring IP address information. IP addresses are
displayed in classical sub-net format by default but you can change the display format to CIDR. See "Changing
the Network Mask Display to Prefix Format" on page 15-83.
Layer 3 Switches
Foundry Layer 3 Switches allow you to configure IP addresses on the following types of interfaces:
• Ethernet ports
• Packet over SONET (POS) ports
• Virtual routing interfaces (used by VLANs to route among one another)
• Loopback interfaces
Each IP address on a Layer 3 Switch must be in a different sub-net. You can have only one interface that is in a
given sub-net. For example, you can configure IP addresses 192.168.1.1/24 and 192.168.2.1/24 on the same
Layer 3 Switch, but you cannot configure 192.168.1.1/24 and 192.168.1.2/24 on the same Layer 3 Switch.
You can configure multiple IP addresses on the same interface.
15 - 2 December 2000