Enabling Bgp - Dell S6100 Configuration Manual

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Enabling BGP

By default, BGP is not enabled on the system. Dell Networking OS supports one autonomous system (AS) and assigns the AS number

To establish BGP sessions and route traffic, configure at least one BGP neighbor or peer.

In BGP, routers with an established TCP connection are called neighbors or peers. After a connection is established, the neighbors

exchange full BGP routing tables with incremental updates afterward. In addition, neighbors exchange KEEPALIVE messages to maintain

the connection.

In BGP, neighbor routers or peers can be classified as internal or external. External BGP peers must be connected physically to one another

(unless you enable the EBGP multihop feature), while internal BGP peers do not need to be directly connected. The IP address of an EBGP

neighbor is usually the IP address of the interface directly connected to the router. First, the BGP process determines if all internal BGP

peers are reachable, then it determines which peers outside the AS are reachable.

Sample Configurations

Assign an AS number and enter ROUTER BGP mode.

CONFIGURATION mode

router bgp as-number

as-number: from 0 to 65535 (2 Byte) or from 1 to 4294967295 (4 Byte) or 0.1 to 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.

Enable 4-Byte support for the BGP process.

number representation.

CONFIG-ROUTER-BGP mode

bgp four-octet-as-support

Border Gateway Protocol IPv4 (BGPv4)

for enabling BGP routers are found at the end of this

This command is OPTIONAL. Enable if you want to use 4-Byte AS numbers or if you support AS4

suppress = 2000

max-suppress-time = 60 minutes

external distance = 20

internal distance = 200

local distance = 200

keepalive = 60 seconds

holdtime = 180 seconds