- ページ 38

サーバー Cisco ONS 15454 SDH E1-75のPDF マニュアルをオンラインで閲覧またはダウンロードできます。Cisco ONS 15454 SDH E1-75 40 ページ。 Impedance conversion panel
Cisco ONS 15454 SDH E1-75 にも：クイック・リファレンス・マニュアル (16 ページ), リファレンス・マニュアル (22 ページ), インストール (13 ページ)

11.20.1 Server Trail Protection Types

The server trail protection type determines the protection type for any circuits that traverse it. A server

trail link can be one of the following protection types:

•

Only SNCP protection is available on server trails. The software does not allow creation of MS-SPRings.

Note

11.20.2 VCAT Circuit Routing over Server Trails

An STS-3c server trail can be used to route STS-3c circuits and an STS-1 server trail can be used to route

STS-1 circuits. Similarly, a VT1.5 server trail can be used to route VT1.5 circuits and an STS-12c server

trail can only be used for STS-12c circuits.

For example, to route a STS-3c-2v circuit over a server trail, you must enable split fiber routing and

create two STS-3c server trails and route each member manually or automatically over each server trail.

To route a STS-12c-2v circuit over a server trail, you must enable split fiber routing and create two

STS-12c server trails and route each member manually or automatically over each server trail.

Server trails can only be created between any two optical ports or EC-1 ports.

Note

VCAT circusits can be created over server trails in the following ways:

•

Note

When creating circuits or VCATs, you can choose a server trail link during manual circuit routing. CTC

may also route circuits over server trail links during automatic routing. VCAT common-fiber automatic

routing is not supported.

For a detailed procedure on how to route a VCAT circuit over a server trail, refer "Chapter 6, Create

Circuits and VT Tunnels, Section NTP-A264, Create an Automatically Routed VCAT Circuit and

Section NTP-A265, Create a Manually Routed VCAT Circuit" in the Cisco ONS 15454 Procedure

Guide.

Cisco ONS 15454 SDH Reference Manual, R8.5

11-38

Preemptible—PCA circuits will use server trails with the Preemptible attribute.

Unprotected—In Unprotected Server Trail, CTC assumes that the circuits going out from that

specific port will not be protected by provider network and will look for a secondary path from

source to destination if you are creating a protected circuit.

Fully Protected—In Fully Protected Server Trail, CTC assumes that the circuits going out from that

specific port will be protected by provider network and will not look for a secondary path from

source to destination.

Manual routing

Automatic routing

Diverse routing: This method enables VCAT circuit routing over diverse server trail links.

–

Chapter 11 Circuits and Tunnels

78-18119-01