Dell Force10 Z9000 FTOS Command Line Reference Guide for the Z9000 System FTOS - Page 341
bgp fast-external-fallover, bgp four-octet-as-support
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Usage Information Related Commands Version 7.8.1.0 Version 7.7.1.0 Version 7.4.1.0 Introduced on the S-Series. Introduced on the C-Series. Introduced. This is enabled by default, that is for all updates received from EBGP peers, BGP ensures that the first AS of the first AS segment is always the AS of the peer. If not, the update is dropped and a counter is increments. Use the show ip bgp neighbors command to view the "failed enforce-first-as check" counter. If you disable the enforce-first-as command, it can be viewed using the show ip protocols command. show ip bgp neighbors - views the information exchanged by BGP neighbors. show ip protocols - views information on routing protocols. bgp fast-external-fallover Enable the fast external fallover feature, which immediately resets the BGP session if a link to a directly connected external peer fails. C-Series, E-Series, S-Series, Z-Series, S4810 Syntax bgp fast-external-fallover To disable fast external fallover, use the no bgp fast-external-fallover command. Defaults Command Modes Command History Enabled ROUTER BGP Version 8.3.11.1 Version 8.3.7.0 Version 7.8.1.0 Version 7.7.1.0 Introduced on the Z9000. Introduced on the S4810. Introduced on the S-Series. Introduced on the C-Series. Usage Information The bgp fast-external-fallover command appears in the show config command output. bgp four-octet-as-support Enable 4-byte support for the BGP process. C-Series, E-Series, S-Series, Z-Series, S4810 Syntax bgp four-octet-as-support To disable fast external fallover, use the no bgp four-octet-as-support command. Defaults Command Modes Disabled (supports 2-byte format) ROUTER BGP 341
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