Command Modes ROUTER BGPCommand History Version 8.3.11.1 Introduced on the Z9000.Version 8.3.7.0 Introduced on the S4810.Version 8.3.1.0 Introduced the dynamic application of AS notation changesVersion 8.2.1.0 IntroducedUsageInformationBefore enabling this feature, you must enable the enable bgp four-octet-as-supportcommand. If you disable the four-octect-support command after using dotor dot+ format, the AS numbers revert to asplain text.When you apply an asnotation, it is reflected in the running-configuration. If you change thenotation type, the running-config updates dynamically and the new notation showns.Example FTOS(conf)#router bgp 1FTOS(conf-router_bgp)#bgp asnotation asdotFTOS(conf-router_bgp)#exFTOS(conf)#do show run | grep bgprouter bgp 1bgp four-octet-as-supportbgp asnotation asdotFTOS(conf)#router bgp 1FTOS(conf-router_bgp)#bgp asnotation asdot+FTOS(conf-router_bgp)#exFTOS(conf)#do show run | grep bgprouter bgp 1bgp four-octet-as-supportbgp asnotation asdot+FTOS(conf)#router bgp 1FTOS(conf-router_bgp)#bgp asnotation asplainFTOS(conf-router_bgp)#exFTOS(conf)#do show run |grep bgprouter bgp 1bgp four-octet-as-supportFTOS(conf)#RelatedCommandsbgp four-octet-as-support – enables 4-byte support for the BGP process.bgp bestpath as-path ignoreIgnore the AS PATH in BGP best path calculations.C-Series, E-Series, S-Series, Z-Series, S4810Syntax bgp bestpath as-path ignoreTo return to the default, enter the no bgp bestpath as-path ignore command.Defaults Disabled (that is, the software considers the AS_PATH when choosing a route as best).333
