From: Victor Cappuccio (victor@ccbootcamp.com)
Date: Wed Feb 14 2007 - 13:02:52 ART
Hi Joe,
Yes I've seen RSVP working real good on a Big MPLS/TE for a GSM R4
Network for Telefonica in Venezuela using Nokia equipments for the
Signaling and Call Control Establishment. We used the RSVP as the
mechanism for establishing TE Label Switched Paths (LSPs) that differs
from the IGP MPLS LSPs
There is a Draft Document draft-ietf-mpls-rsvp-lsp-tunnel-0X.txt, which
you can look at to get more information about this.
http://www.nanog.org/mtg-0002/ppt/raszuk/tsld054.htm
in this link you can find more information about the use of RSVP in a
MPLS Network
For example 3 Router connected in a Line R1 --- R2 --- R3 RSVP is used
to signal
The Path Setup using RSVP is like this:
R1
Path:
Common_Header
Session(R3-lo0, 0, R1-lo0)
PHOP(R1-2)
Label_Request(IP)
ERO (R2-1, R3-1)
Session_Attribute (S(3), H(3), 0x04)
Sender_Template(R1-lo0, 00)
Sender_Tspec(2Mbps)
Record_Route(R1-2)
R2
Path State:
Session(R3-lo0, 0, R1-lo0)
PHOP(R1-2)
Label_Request(IP)
ERO (R2-1, R3-1)
Session_Attribute (S(3), H(3), 0x04)
Sender_Template(R1-lo0, 00)
Sender_Tspec(2Mbps)
Record_Route (R1-2)
R3
Path:
Common_Header
Session(R3-lo0, 0, R1-lo0)
PHOP(R2-2)
Label_Request(IP)
ERO (R3-1)
Session_Attribute (S(3), H(3), 0x04)
Sender_Template(R1-lo0, 00)
Sender_Tspec(2Mbps)
Record_Route (R1-2, R2-2)
This is useful to know if BW is available, this BW is put aside in a
waiting pool (waiting for the RESV msg) if this process required the
pre-emption of resources, LCAC notified RSVP of the pre-emption which
then sent PathErr and/or ResvErr for the preempted tunnel
Something like:
R3
Path State:
Session(R3-lo0, 0, R1-lo0)
PHOP(R2-2)
Label_Request(IP)
ERO ()
Session_Attribute (S(3), H(3), 0x04)
Sender_Template(R1-lo0, 00)
Sender_Tspec(2Mbps)
Record_Route (R1-2, R2-2, R3-1)
R2
Resv:
Common_Header
Session(R3-lo0, 0, R1-lo0)
PHOP(R3-1)
Style=SE
FlowSpec(2Mbps)
Sender_Template(R1-lo0, 00)
Label=POP
Record_Route(R3-1)
R1
Resv:
Common_Header
Session(R3-lo0, 0, R1-lo0)
PHOP(R2-1)
Style=SE
FlowSpec (2Mbps)
Sender_Template(R1-lo0, 00)
Label=5
Record_Route(R2-1, R3-1)
More at
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft
/120limit/120st/120st14/scalable.htm#14019
Just my 2 Cents
thanks,
Victor.-
Network Learning Inc - A Cisco Sponsored Organization (SO) YES! We take
Cisco Learning credits!
victor@ccbootcamp.com
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Joe Chang
Sent: Wednesday, February 14, 2007 5:13 AM
To: ccielab@groupstudy.com
Subject: RSVP in real world practice
Importance: Low
Given the scaling difficulties of RSVP, has anyone actually seen it
applied in
a production network?
Thanks,
Joe
#16805
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