Setting the Pnni interface aggregation token

Chapter 10 Managing PNNI Routing

Here you can see the ATM interface on the switch slot. For every interface you find the following information:

Field	Description


Interface Index	This is the ifIndex for this port.

Pnni Port	This is the port ID as known to PNNI.

Aggr Token	This is the aggregation token for the link if exists. The
	Aggregation Token is used by the network administrator to
	indicate to the PGL how to aggregate multiple uplinks into
	higher-level horizontal links.

VP Cap	Indicates whether the interface is capable of carrying VPCs or
	not.

Admin Weight	Indicates the administered weight that is currently assigned for
	the link for different Classes of Services: CBR (Constant Bit
	Rate), RtVBR (Real Time Variable Bit Rate), NrtVBR (Non-real
	time VBR), ABR (Available Bit Rate), and UBR (Unspecified Bit
	Rate). The default value is 5040 for all administered weights.
	Administered Weights are used during routes calculation.
	When different routes to the destination are available, the one
	with the lowest cost is taken. The cost of the route is calculated
	as the summation of all admin. weight along the path.

Setting the PNNI interface aggregation token

The aggregation token is significant in multiple peer groups configuration. When two different outside links to the same peer group has the same derived aggregation token, the PGL/LGN will aggregate them into one higher level horizontal link. However, if their derived aggregation tokens are different, two higher level horizontal links shall be advertised. This may be useful, if the network administrator has a reason to distinguish between the two links.

Note: A derived aggregation token is calculated from the configured aggregation token at both ends, using the following formula. If the configured aggregation token at both ends is the same, the derived aggregation token gets this value. If one configured aggregation token has a non-zero value and the other one is zero, the derived aggregation token gets the non-zero value. If both ends have a non-zero configured aggregation token, and these values are not the same, the derived aggregation token is zero.

Avaya M770 ATM Switch User’s Guide

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Avaya M770 manual Setting the Pnni interface aggregation token

Models: M770

Setting the PNNI interface aggregation token

M770 specifications