1.MPLS traffic engineering use opaque (LSA type 9,10,11) to get eg. BW of the link!
But in OSPF , when there is a change in an area, the LSA will flood to all. So if there is an application transfer a file on the link, the BW will change continuosly (?), so the LSA will flood and how can the CR-LDP know what information about BW on that link to use.
2.In an multi-area OSPF network, which router will start the label distribution process??
3.Is there any document about opaque with MPLS-TE. I try RFC3630 but it's very difficult to understand.
A1) The announced bandwidth does only change when there is a new "booking". This means that only when a new tunnel is routed over a link, when a tunnel is removed from a link or when a link up/down event occurs flooding is needed. To control the amount of opaque LSAs, thresholds are used for the booking bandwidth value.
The real bandwidth utilized at any moment in time is not taken into account by MPLS TE!
A2) Every MPLS TE enabled router will send LSA 10 and ABRs will insert this info into other areas. So pretty much LSA generation and flooding does not deviate from "normal" OSPF LSAs.
A3) I would also read "RFC 2370, The OSPF Opaque LSA Option".
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...