Dell Force10 Z9000 FTOS Command Line Reference Guide for the Z9000 System FTOS - Page 461
bgp enforce-first-as, bgp fast-external-fallover
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Parameters Defaults Command Modes Command History Usage Information value Enter a number to assign to routes as the degree of preference for those routes. When routes are compared, the higher the degree of preference or local preference value, the more the route is preferred. The range is 0 to 4294967295. The default is 100. 100 ROUTER BGP Version 8.2.1.0 Version 7.4.1.0 Introduced on the E-Series ExaScale. Introduced The bgp default local-preference command setting is applied by all routers within the AS. bgp enforce-first-as Disable (or enable) enforce-first-as check for udates received from EBGP peers. C-Series, E-Series Syntax bgp enforce-first-as To turn off the default, use the no bgp enforce-first-as command. Defaults Command Modes Command History Enabled. ROUTER BGP Version 8.2.1.0 Version 7.4.1.0 Introduced on the E-Series ExaScale. Introduced Usage Information Related Commands 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 incremented. Use the show ip bgp neighbors command to view the "failed enforce-first-as check" counter. If you disable enforce-first-as, you can view it 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 Syntax bgp fast-external-fallover 461
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