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Configuring Trunks
Working With Trunks
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000 1/19/057-23
Hold Down
Time
Accept the default value zero (0), or enter a value between zero (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 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 Specify one of the following options from the pull-down menu to
designate the type of traffic allowed on this trunk:
All – (default) Trunk can carry SVC, PVC, and network management
traffic, and OSPF address distribution.
Management Only – Trunk can carry only network management traffic,
such as SNMP communication between a switch and the NMS.
Management & User – 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.
Layer2 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 bandwidth in Kbps for the selected trunk line.
Area ID Areas are collections of networks, hosts, and routers used for IP
routing. The area ID identifies the area.
If a trunk is in Area 1 and the OSPF Backwards Compatibility option
(which is set through IP services) is set to Yes, external routes are not
advertised across that link.
Enter the area ID (x.x.x.x) for the destination area for this endpoint.
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.
Notes: Modifying the value for this attribute does not bring down the
trunk or the associated logical port.
Area 1 is reserved for Lucent switches.
Table 7-3. Add Trunk: Administrative Tab Fields (Continued)
Field Action/Description
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