Cisco CX-FEIP-2TX= Installation and con?guration Specifications Page 421

  • Download
  • Add to my manuals
  • Print
  • Page
    / 493
  • Table of contents
  • BOOKMARKS
  • Rated. / 5. Based on customer reviews
Page view 420
A-1
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
APPENDIX
A
Circuit Routing
This appendix provides an in-depth explanation of ONS 15454 circuit routing and VT tunneling in mixed
protection or meshed environments, such as the one shown in Figure A-1. For circuit creation and
provisioning procedures, see Chapter 6, “Circuits and Tunnels.”
Figure A-1 Multiple protection domains
Automatic Circuit Routing
If you select automatic routing during circuit creation, Cisco Transport Controller (CTC) routes the
circuit by dividing the entire circuit route into segments based on protection domains. For unprotected
segments of protected circuits, CTC finds an alternate route to protect the segment in a virtual UPSR
fashion. Each path segment is a separate protection domain, and each protection domain is protected in
a specific fashion (virtual UPSR, BLSR, or 1+1).
55401
BLSR ring
1+1 1+1
1+1
Twoway Twoway
Twoway Twoway
Node 8Node 7
Node 5 Node 6
UPSR UPSR
TwowayTwoway
Node 4Node 3
Node 1 Node 2
Twoway
Node 12Node 11
Node 9 Node 10
Source
Primary path
Path Segment 1
UPSR/MESH
protected
Alternate path
Drop
Path Segment 3
BLSR protected
Path Segment 2
1+1 protected
Path Segment 4
1+1 protected
Page view 420
1 2 ... 416 417 418 419 420 421 422 423 424 425 426 ... 492 493

Comments to this Manuals

No comments