Cisco ONS 15454 SDH, Руководство по процедурам

Страница: 276 / 860

6-102
Cisco ONS 15454 SDH Procedure Guide, R7.0
78-17194-01
Chapter 6 Create Circuits and Low-Order Tunnels
NTP- D284 Create a Manually Routed VCAT Circuit
Step 7
Define the circuit attributes ( Figure 6-13 on page 6-99 ):
• Name—Assign a name to the circuit. The name can be alphanumeric and up to 48 characters
(including spaces). Circuit names should be 44 characters or less if you want the ability to create
monitor circuits. If you leave the field blank, CTC assigns a default name to the circuit.
•
Type—Displays the circuit type you chose in Step 5 . You cannot change it.
• Bidirectional—Checked is the default. You cannot change it.
•
Create cross-connects only (TL1-like)—Check this check box if you want to create one or more
cross-connects to complete a signal path for TL1-generated circuits. If you check this box, low-order
tunnels and Ethergroup sources and destinations are unavailable.
• State—Choose Unlocked .
•
Apply to drop ports—Check this check box to apply the IS administrative state to the circuit source
and destination ports. CTC applies the administrative state to the ports only if the circuit bandwidth
is the same as the port bandwidth or, if the port bandwidth is larger than the circuit, the circuit must
be the first circuit to use the port. If not, a Warning dialog box shows the ports where the
administrative state could not be applied. If the check box is unchecked, CTC does not change the
service state of the source and destination ports.
• Symmetric—Checked is the default. You cannot change it.
•
Member size—Choose the member size. For information about the member size supported for each
card, refer to the “Circuits and Tunnels” chapter in the
Cisco ONS 15454 SDH Reference Manual .
• Num. of members—Choose the number of members. For information about the number of members
supported for each card, refer to the “Circuits and Tunnels” chapter in the
Cisco ONS 15454 SDH
Reference Manual .
•
Mode—Choose the protection mode for the VCAT circuit:
– None—Provides no protection. A failure on one member causes the entire VCAT circuit to fail.
You cannot delete members after creating a VCAT circuit with no protection.
–
SW-LCAS—Allows the VCAT circuit to adapt to member failures and keep traffic flowing after
failures at a reduced bandwidth. SW-LCAS provides interoperability with the ML-Series cards.
SW-LCAS uses legacy SONET failure indicators like AIS-P and RDI-P to detect member
failure. You cannot add or delete members from a VCAT circuit with SW-LCAS protection.
– LCAS—Sets the VCAT circuit to use LCAS. With LCAS, you can add or delete members
without interrupting the operation of uninvolved members. If a member fails, LCAS temporarily
removes the failed member from the VCAT circuit. The remaining members carry the traffic
until the failure clears.
Step 8
Click Next .
Step 9 Complete the “DLP-D36 Provision a VCAT Circuit Source and Destination” task on page 17-28 for the
VCAT circuit you are creating.
Step 10
In the Circuit Routing Preferences area ( Figure 6-14 on page 6-99 ), uncheck Route Automatically .
Step 11 If you want to set preferences for individual members, complete the following in the Member
Preferences area. Repeat for each member and continue with
Step 13 . To set identical preferences for all
members, skip this step and continue with Step 12 .
a.
Number—Choose a number (between 1 and 256) from the drop-down list to identify the member.
b. Name—Type a unique name to identify the member. The name can be alphanumeric and up to
48 characters (including spaces). If you leave the field blank, CTC assigns a default name to the
circuit.
c.
Protection—Choose the member protection type: