Cabletron Systems SSIM-R8-02 Spécifications télécharger pdf (Page 172)

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BGP Configuration Examples

152 Enterasys Xpedition User Reference Manual

The following is an example:

Notes on Using the AS Path Prepend Feature

• Use the as-count option for external peer-hosts only.

• If the as-count option is entered for an active BGP session, routes will not be resent to

reflect the new setting. To have routes reflect the new setting, you must restart the peer

session. To do this:

a. Enter Configure mode.

b. Negate the command that adds the peer-host to the peer-group. (If this causes the

number of peer-hosts in the peer-group to drop to zero, then you must also

negate the command that creates the peer group.)

c. Exit Configure mode.

d. Re-enter Configure mode.

e. Add the peer-host back to the peer-group.

If the as-count option is part of the startup configuration, the above steps are

unnecessary.

BGP Configuration Examples

This section presents sample configurations illustrating BGP features. The following

features are demonstrated:

• BGP peering

• Internal BGP (IBGP)

• External BGP (EBGP) multihop

• BGP community attribute

• BGP local preference (local_pref) attribute

# insert two instances of the AS when advertising the route to this peer

/jointfilesconvert/276250/bgp set peer-host 194.178.244.33 group nlnet as-count 2

# insert three instances of the AS when advertising the route to this

# peer

/jointfilesconvert/276250/bgp set peer-host 194.109.86.5 group webnet as-count 3

1 2 ... 167 168 169 170 171 172 173 174 175 176 177 ... 393 394

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