The MPLS WG Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] [MPLS] LDP GR query
Hi M. Leelanivas , Y. Rekhter and R. Aggarwal, RTA----LANSWITCH-×---LANSWITCH----RTB If the link between the two LAN-SWITCH is down ,RTA and
RTB will think the other side LSR restarting,so these two LSR will think
themselves as helper router. They will perform GR flow together. In this scenario ,we can use other mechanism ( such as
BFD) to avoid performing GR process . But if we don’t have other mechanism, then
these two LSR will perform GR process. Another case
, the LDP session will be down is when the LSR’s
neighbor can’t send out it’s packet, including hello packet or keepalive packet,
if the control plane of it’s neighbor is very busy or occurs some error ,then
the LDP session will be down. In this case the LSR will conclude that it’s
neighbor restart and the LSR will implement GR flow. I want to know whether the LSR clearly signal it’s neighbor that it is restarting through FT session TLV in RFC 3478 .
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