Beta Draft Confidential
9-561/19/05 ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring ATM Over MPLS Gateway Solution on CBX 3500
Configuring a Layer 2 Tunnel Over MPLS Core Network
Layer 2 Tunnel VNN Attributes
If this tunnel is being configured for VNN, select the VNN tab (Figure 9-27) and
complete the fields as described in Table 9-23.
Figure 9-27. Add Layer2 Tunnel: VNN Tab
Table 9-23. Add Layer 2 Tunnel: VNN Tab Fields
Field Description
Stat Delay (0-max) Represents the measured one-way delay in units of 100
microseconds. This measurement is taken when the trunk
initializes and it is only updated when the trunk state changes
from Down to Up. The static delay value is used in
conjunction with the end-to-end delay routing metric to
enable you to route circuits over trunks with the lowest
end-to-end delay. To modify the Static Delay value, see
page 7-4.
Hold Down Timer (0-max) Enter a value between zero (0) and 65535 (seconds).
Hold down timer allows you to configure the time delay (in
seconds) before link state advertisements (LSAs) are
generated when a tunnel recovery takes effect on the network.
The time delay is not used when a tunnel is brought up for the
first time, when a tunnel’s OSPF area ID changes, and when a
tunnel goes down. This setting can reduce the number of
LSAs caused by rapid changes in tunnel status.
Keep Alive Timer Not supported in this release.
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