Figure 4 Establishing Lsps; Figure 5 Lsp Using Rsvp-Te Path Setup - Nokia 7705 SAR-W Series Manual

MPLS Guide
Figure 4
Figure 5
label edge router (iLER 1) transmits an RSVP-TE PATH message (path: 30.30.30.1)
downstream to the egress label edge router (eLER 4). The PATH message contains
a label request object that requests intermediate LSRs and the eLER to provide a
label binding for this path.
LSP Using RSVP-TE Path Setup
Figure 5
SFO
10.10.10.1
label
100/push
SFO
10.10.10.1
In addition to the label request object, an RSVP-TE PATH message can also contain
a number of optional objects:
3HE 18686 AAAB TQZZA
Establishing LSPs
iLER
1
displays an example of an LSP path set up using RSVP-TE. The ingress
PATH:30.30.30.1
1 2
RESV:10.10.10.1
label
100/200/swap
1 2
100 200
• explicit route object (ERO) — forces the RSVP-TE PATH message to follow the
path specified by the ERO (independent of the IGP shortest path)
• record route object (RRO) — allows the iLER to receive a listing of the LSRs that
the LSP tunnel actually traverses
• session attribute object — controls the path setup priority, holding priority, and
local rerouting features
Use subject to Terms available at: www.nokia.com
PATH PATH
LSP
LSR LSR
2 3
RESV RESV
PATH:30.30.30.1 PATH:30.30.30.1
3
RESV:10.10.10.1
label
200/300/swap
3
300
© 2022 Nokia.
MPLS and RSVP-TE
PATH
eLER
4
RESV
NYC
4
30.30.30.1
RESV:10.10.10.1
RESV:10.10.10.1
label
300/pop
NYC
4
30.30.30.1
20120
20121
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