[j-nsp] RSVP hidden routes in inet.0

[Misak Khachatryan]

Hello,

Recently I implemented RSVP in my network, nothing so fancy - automesh and autobandwidth with node-link protection.

By doing final review i saw output of show route summary:

inet.0: 296 destinations, 298 routes (275 active, 0 holddown, 21 hidden)
              Direct:      6 routes,      5 active
               Local:      5 routes,      5 active
                OSPF:    265 routes,    264 active
                RSVP:     21 routes,      0 active
                 LDP:      1 routes,      1 active

It is very curious for me why I see hidden RSVP routes in inet.0. It seems somehow related to bypass LSP's and how Juniper organises it. Here they are:

> show route protocol rsvp table inet.0 hidden

inet.0: 296 destinations, 298 routes (275 active, 0 holddown, 21 hidden)
@ = Routing Use Only, # = Forwarding Use Only
+ = Active Route, - = Last Active, * = Both

10.255.0.21/32<http://10.255.0.21/32>      [RSVP] 01:11:54, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.222->10.255.0.21
10.255.0.29/32<http://10.255.0.29/32>      [RSVP] 1d 10:26:25, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.0.29
10.255.0.33/32<http://10.255.0.33/32>      [RSVP] 1d 10:26:25, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.0.33
10.255.0.38/32<http://10.255.0.38/32>      [RSVP] 1d 09:32:03, metric 1
                    >  to 10.255.0.230 via ae4.7, label-switched-path Bypass->10.255.0.222->10.255.0.38
10.255.0.70/32<http://10.255.0.70/32>      [RSVP] 04:53:42, metric 1
                    >  to 10.255.0.230 via ae4.7, label-switched-path Bypass->10.255.0.226->10.255.0.70
10.255.0.73/32<http://10.255.0.73/32>      [RSVP] 1d 10:26:21, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.0.73
10.255.0.122/32<http://10.255.0.122/32>     [RSVP] 1d 10:26:21, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.0.122
10.255.0.126/32<http://10.255.0.126/32>     [RSVP] 1d 10:26:41, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.0.126
10.255.0.134/32<http://10.255.0.134/32>     [RSVP] 1d 05:27:20, metric 1
                    >  to 10.255.0.230 via ae4.7, label-switched-path Bypass->10.255.0.222->10.255.0.134
10.255.0.174/32<http://10.255.0.174/32>     [RSVP] 1d 07:19:25, metric 1
                    >  to 10.255.0.230 via ae4.7, label-switched-path Bypass->10.255.0.222->10.255.0.174
10.255.0.181/32<http://10.255.0.181/32>     [RSVP] 1d 10:26:19, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.0.181
10.255.0.185/32<http://10.255.0.185/32>     [RSVP] 1d 10:26:19, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.0.185
10.255.0.201/32<http://10.255.0.201/32>     [RSVP] 1d 10:17:37, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.222->10.255.0.201
10.255.0.214/32<http://10.255.0.214/32>     [RSVP] 03:16:59, metric 1
                    >  to 10.255.0.222 via ae0.7, label-switched-path Bypass->10.255.0.226->10.255.0.214
10.255.0.222/32<http://10.255.0.222/32>     [RSVP] 1d 10:17:34, metric 1
                    >  to 10.255.0.230 via ae4.7, label-switched-path Bypass->10.255.0.222
10.255.0.226/32<http://10.255.0.226/32>     [RSVP] 02:45:52, metric 1
                    >  to 10.255.0.222 via ae0.7, label-switched-path Bypass->10.255.0.226
10.255.0.230/32<http://10.255.0.230/32>     [RSVP] 1d 10:26:17, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230
10.255.25.69/32<http://10.255.25.69/32>     [RSVP] 1d 10:26:17, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.25.69
10.255.25.73/32<http://10.255.25.73/32>     [RSVP] 1d 10:26:15, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.25.73
10.255.25.150/32<http://10.255.25.150/32>    [RSVP] 1d 10:26:50, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.25.150
10.255.25.158/32<http://10.255.25.158/32>    [RSVP] 1d 10:26:50, metric 1
                    >  to 10.255.0.226 via ae1.7, label-switched-path Bypass->10.255.0.230->10.255.25.158

The /32 routes here are the IPs of adjacent routers. The only thing I found in inet is that Juniper does something similar with LDP over RSVP.

It seems like some dirty hack on the control plane side, but I will be very grateful if someone can explain.

Best regards,
Misak Khachatryan