Beta Draft Confidential
8-461/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Over MPLS Trunks
Configuring the ATMoMPLS Trunk
Hold Down Time Accept the default value 0 (zero), or enter a value between 0 and
65535 (seconds).
Hold down time allows you to configure the time delay (in
seconds) before link state advertisements (LSAs) are generated
when a trunk recovery takes effect on the network. The time
delay is not used when a trunk is brought up for the first time,
when a trunk’s Open Shortest Path First (OSPF) area ID
changes, and when a trunk goes down. This setting can reduce
the number of LSAs caused by rapid changes in trunk status.
Traffic Allowed Select one of the following options from the pull-down list to
designate the type of traffic allowed on this trunk:
• All – Trunk can carry SVC, PVC, and network management
traffic.
• Management Only – Trunk can carry only network
management traffic, such as SNMP communication between
a switch and the NMS.
• Management & User Data – Trunk can carry PVCs and
network management traffic. This trunk option does not
support SVC addressing information. If this is the only trunk
between two nodes and you configure this option for it, then
you effectively prevent SVC traffic from traversing this
trunk.
Layer 2 VPN Name Select a Layer2 Virtual Private Network (VPN) name. The
default is Public. To select a different Layer2 VPN name, clear
the Default check box and choose the Select Layer2 VPN button.
For more information about Layer2 VPNs, see Chapter 13,
“Configuring Layer 2 VPNs.”
Defined Bandwidth
(Kbps)
Displays the amount of defined bandwidth in Kbps.
Virtual Bandwidth
(Kbps)
Displays the amount of virtual bandwidth in Kbps.
The value .95 is used because .05% of the bandwidth is reserved
for network management, routing updates, and other
management traffic.
Area ID Areas are collections of networks, hosts, and routers used for IP
routing. The area ID identifies the area. The range of available
values is from 0.0.0.0 to 255.255. 255.255. Area 0.0.0.0 is the
network backbone area. Area 0.0.0.1 is Area 1. For a detailed
description of OSPF areas, and how to use IP to configure
multiple OSPF areas, see the IP Services Configuration Guide
for CBX 3500, CBX 500, and B-STDX 9000.
Table 8-13. Add Trunk: Administrative Tab (Continued)
Field Action/Description
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