draftchenpcelabelxdomains00 Huaimo Chen huaimochenhuaweicom Autumn Liu autumnliuericssoncom Fengman Xu fengmanxuverizoncom Mehmet Toy mehmettoycablecomcastcom Vic Liu liuzhihengchinamobilecom ID: 485393
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Slide1
Extensions to PCEP for Distributing Label across Domains
draft-chen-pce-label-x-domains-00
Huaimo
Chen (huaimo.chen@huawei.com)
Autumn Liu (autumn.liu@ericsson.com)
Fengman Xu (fengman.xu@verizon.com)
Mehmet Toy (mehmet_toy@cable.comcast.com)
Vic
Liu (liuzhiheng@chinamobile.com)Slide2
Introduction
Multiple Tunnel Central Controllers (TCC)
Each controller controls one domain
Manage/Allocate resources including Label resource
Set up segment of TE LSP tunnel in the domainPath for TE LSP crossing domains is computed by PCEs
Page 2
TCC2
TCC3
TCC1
A
U
T
Q
R
L
M
N
K
J
I
H
G
E
F
C
B
S
P
D
D1
D2
D3
PCE1
PCE2
PCE3
PCE1/PCE2/PCE3
is responsible
for
domain D1/D2/D3 respectively
TCC1/TCC2/TCC3 controls
D1/D2/D3 respectivelySlide3
Problem to be solved
To create an E2E TE LSP crossing domains by controllers
Each upstream controller needs a Label from downstream domain
Label fo
r entry border node (e.g., node E) along LSP in downstream domain (e.g., domain D2) needs to be sent to upstream controller (e.g., controller TTC1)Distribution of Label can be done by PCEPage 3TCC2
TCC3
TCC1
A
U
T
Q
R
L
M
N
K
J
I
H
G
E
F
C
B
S
P
D
D1
D2
D3
PCE1
PCE2
PCE3
Label
Label
PCE1/PCE2/PCE3
is responsible
for
domain D1/D2/D3 respectively
TCC1/TCC2/TCC3 controls D1/D2/D3
TCC1 for D1 needs Label from E in D2 to set up A
BCE
TCC2 for D2 needs Label from R in D3 to set up E
FHJR
PCE sends Label from D2 to D1
PCE sends Label from D3 to D2Slide4
Next Step
Request for comments and suggestionsSlide5
Extensions to PCEP
2 Bits in RP ObjectL (Label distribution): 1:
PCReq
or
PCRep message for distributing label crossing domains.C (LSP Creation): 1: PCReq or PCRep message for creating segment of LSP before distributing labelLabel Object
Containing a Label and a node from which Label is allocated
LSP Tunnel Object
Containing information identifying
an LSP tunnel in multiple controller environment
Page 5
Label
Node IP Address (optional)
Egress IP Address / P2MP ID
Extended Tunnel ID
Controller ID
LSP ID
Tunnel ID
Reserved
Reserved