Qos Policies; Ip Filter Policies - Alcatel-Lucent 7705 Service Manual

Cell concatenation is supported only for N-to-1 cell mode, where N = 1.
The number of cells in the payload of a single VLL packet is user-configurable, which
ensures proper transport of traffic sensitive to delay and jitter. (For example, for voice traffic
in 3G/WCDMA, delay is a crucial factor and the time spent for concatenation should be
minimized. The payload is extremely delay-sensitive and should be transported with only a
small amount of bandwidth optimization.) In all cases, the number of cells in a VLL packet
must be less than the MTU size, where the MTU maximum is 1514 bytes and the maximum
N-to-1 mode payload is 29 cells (52 ATM bytes per cell (no HEC byte)).
While cells are being packed, the concatenation process may be terminated by any one of the
following conditions. Each condition has a configurable attribute associated with it:
If none of the conditions are met, the packet is sent when the MTU is reached. The CLP bits
are untouched, even if VPI/VCI translation occurs at egress.
Note: Configuring the attributes that provide the best compromise between minimizing delay
(low number of cells concatenated) and maximizing bandwidth (high number of cells
concatenated) requires careful planning.

QoS Policies

When applied to 7705 SAR Apipe, Cpipe, Epipe, and Ipipe services, service ingress QoS
policies only create the unicast queues defined in the policy.
With Apipe, Cpipe, Epipe, and Ipipe services, egress QoS policies function as with other
services where the class-based queues are created as defined in the policy.
Both Layer 2 and Layer 3 criteria can be used in the QoS policies for traffic classification in
a Cpipe, Epipe, or Ipipe service. QoS policies on Apipes cannot perform any classification.

IP Filter Policies

The 7705 SAR supports ingress IP filter policies on Epipe and Ipipe SAPs, VPRN SAPs and
IES SAPs. Configuration of IP filter policies for Epipes, Ipipes, VPRN, and IES SAPs is
similar to configuration of IP filters for network interfaces and IES management SAPs.
Refer to the 7705 SAR OS Router Configuration Guide, "Filter Policies", for information on
configuring IP filters.
7705 SAR OS Services Guide
• reaching a maximum number of cells per packet
• expiring of a timer
• changing of the cell loss priority (CLP) bit
VLL Services
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