Avaya BayRS Version 15.1.0.0 Notice download pdf (Page 38)

Release Notes for BayRS Version 15.1.0.0

308663-15.1 Rev 00

ATM Guidelines

Follow these guidelines when configuring ATM:

ATM Half Bridge Support

BayRS Version 15.1.0.0 includes support of the ATM Half Bridge (AHB) feature.

Please be aware that some users, operating under certain conditions, may

encounter issues such as the following:

• When AHB caches an unsecure host that it learned via ARP, the associated

idle time is 0. The idle time remains at 0 and does not age correctly.

• When you boot a router running AHB, the ARE slot logs a fault message.

• When you reset the AHB, it stops forwarding traffic out of the AHB port.

• If you configure AHB on an ATM null PVC, the router may crash.

• If you configure AHB and add a PVC to the router while another system is

sending a ping message to your router, the ARE slot may crash and may begin

executing the cold start hardware diagnostics.

Deleting ATM from a Router If Signaling Is Enabled

Do not delete ATM from a router if you enabled signaling on an ATM circuit.

Otherwise, Site Manager, the BCC, or the Technician Interface will restart after a

few minutes.

Failover and Load Balancing for ATM VCs Not Supported

You can configure multiple ATM virtual circuits (VCs) to the same destination

address. However, this kind of configuration does not provide load balancing or

failover support.

Aggregate Limitations for Sustainable Cell Rate

The aggregate sustainable cell rate (SCR) for all PVCs configured should not

exceed 353207 cells per second for ARE OC-3 SONET/SDH ILI pairs. It is

advisable to set SCR to less than that to ensure there is sufficient bandwidth for

any SVCs that may also be configured on this interface. The SCR is set at the

Xmit Sustainable Cell Rate (cells/s) parameter using Site Manager and at the scr

parameter using the BCC.

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Avaya BayRS Version 15.1.0.0 Notice Page 38