Dell Force10 S4820T S4820T Configuration Guide - Page 201

Use these commands in the following sequence, starting in the CONFIGURATION mode to establish BGP sessions on the router. Step 1 1a 1b 2 3 Command Syntax router bgp as-number bgp four-octet-as-support address-family [ipv4 | ipv6} neighbor {ip-address | peer-group name} remote-as as-number neighbor {ip-address | peer-group-name} no shutdown Command Mode Purpose CONFIGURATION Assign an AS number and enter the ROUTER BGP mode. AS Number: 0-65535 (2-Byte) or 1-4294967295 (4-Byte) or 0.1-65535.65535 (Dotted format) Only one AS is supported per system If you enter a 4-Byte AS Number, 4-Byte AS Support is enabled automatically. CONFIG-ROUTER-B GP Enable 4-Byte support for the BGP process. Note: This is an OPTIONAL command. Enable if you want to use 4-Byte AS numbers or if you support AS4 Number Representation. Use it only if you support 4-Byte AS Numbers or if you support AS4 Number Representation. If you are supporting 4-Byte ASNs, this command must be enabled first. Disable 4-Byte support and return to the default 2-Byte format by using the no bgp four-octet-as-support command. You cannot disable 4-Byte support if you currently have a 4-Byte ASN configured. Disabling 4-Byte AS Numbers also disables ASDOT and ASDOT+ number representation. All AS Numbers will be displayed in ASPLAIN format. CONFIG-ROUTER-B Enable IPv4 multicast or IPv6 mode. GP Use this command to enter BGP for IPv6 mode (CONF-ROUTER_BGPv6_AF). CONFIG-ROUTER-B GP Add a neighbor as a remote AS. Formats: IP Address A.B.C.D Peer-Group Name: 16 characters AS-number: 0-65535 (2-Byte) or 1-4294967295 (4-Byte) or 0.1-65535.65535 (Dotted format) You must Configure Peer Groups before assigning it a remote AS. CONFIG-ROUTER-B Enable the BGP neighbor. GP Note: When you change the configuration of a BGP neighbor, always reset it by entering the clear ip bgp command in EXEC Privilege mode. Border Gateway Protocol IPv4 (BGPv4) | 201