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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical More on AS Transition
A little more on the earlier AS Number transition question... Cisco does have a feature than can do this, the link is: http://www.cisco.com/warp/customer/459/39.html. This is very similar to the Juniper feature, with one key difference: The Juniper feature allows the "spoofed" AS number to be stripped out by using the "private" keyword after the spoofed AS number. Cisco does not, currently. This can result in an additional element is added to the AS-Path of both incoming and outgoing routes - a prepend. This can unexpectedly change routing characteristics, so caution is in order when using the Cisco version of this command (or the Juniper version without the private keyword). i.e. Your downstream asking you why the traffic on their circuit to you dropped 30%, and why the route announcements look different on Looking Glass servers. - Dan Golding NetRail, Inc. |