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Hi,
JUNOS supports both link and node protection (not simultaneously ;-).
It is interoperable with Cisco for link protection mode and can
traverse incompatible sets of LSRs with node protection (obviously,
those incompatible LSRs are not protected but all compatible LSRs
either side of the incompatible LSRs are protected).
This is MPLS's fast reroute.
The node protection works by creating an alternate path for every
protected LSP individually around each node in the path. So, there
are NxM new LSPs created where N is the number of LSPs end to end and
M is the number of LSRs end to end.
The link protection works by creating an LSP along an alternate path
between two adjacent LSRs. If the link joining those LSRs fails, all
LSPs traversing that link are tunneled through the alternate LSP.
In both cases, once the failure has been signalled back to the
ingress, a new LSP will be signalled and the bypass LSPs will be
vacated.
Regards,
Guy
> -----Original Message-----
> From: online [mailto:johnliu@online.sh.cn]
> Sent: Tuesday, July 16, 2002 11:45 AM
> To: juniper-nsp@puck.nether.net
> Subject: [j-nsp] fast reroute
>
>
> Hi,All,
> Does JUNOS support fast reroute link protection or node protection
> or both?
> Is it a private implemation or a IETF draft standard?
> Why JUNOS 5.3's RSVP add a new command for RSVP link protecton?
> Any difference between the MPLS's fast reroute?
> Is it a 1:1 protection so that 1 LSP needs a seperate LSP for
> protection?
> Thanks,
> Regards,
> Liu Jun
>
>
>
>
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This archive was generated by hypermail 2b29 : Mon Aug 05 2002 - 10:42:36 EDT