I work for an ISP and am coordinating with another local ISP to multihome a common customer, we got him a 32 ASN but neither of us support 32 bit ASN yet. We have a common upstream provider who does not support it neither. We decided to use AS23456 on our configuration , should we expect routing issues ? Especially when our provider want to route back the customer traffic ?
Correct. If you need to peer with a neighbor belonging to a 4B ASN, you need to use the AS_TRANS (23456) as its remote AS.
4B ASN capability is negociated during the session establishment so the customer router will see none of its neighbors support it so it will use new optional transitive attributes to send the information in addition to the classic AS_PATH which will contain 23456.
Introduction: The "external-out enable" command is available for
configuration under the "router ospf process" in case of the IOS-XR
operating system. This command basically enables advertisement of
intra-area routes on the device as external routes in th...
IntroductionIn this article we'll discuss how to troubleshoot packet
loss in the asr9000 and specifically understanding the NP drop counters,
what they mean and what you can do to mitigate them. This document will
be an ongoing effort to improve troublesh...