Nortel 5530 Engineering Manual page 9

Filters and QoS Configuration for ERS 5500
Technical Configuration Guide
Destination IPv4/v6 host or subnet
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IPv4/v6 DSCP value
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IPv4 Protocol type, IPv6 next-header
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IPv4/v6 Layer 4 (UDP/TCP) Source port – can be range of ports
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IPv4/v6 Layer 4 (UDP/TCP) Destination port – can be range of ports
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IPv6 flow identifier
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A classifier can contain one Layer 2 element, one IP element, or one Layer 2 and one IP element.
One or more classifiers can be combined to create a classifier block where up to 15 classifiers
and/or classifier blocks can be assigned to a port. By using classifier blocks, the number of
classifiers can be increased up to a total of 114 classifiers per port on the Ethernet Routing
Switch 5500 for a total of over 40K in a stack. In addition, statistic counters can be used to
match/in-profile and out-of-profile statistics with meter. Up to 32 match/in-profile counters and 63
out-of-profile counters (one per meter) are supported per interface.
Actions Supported
After matching a certain classification criteria, various actions can be initiated.
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In-profile actions (metered traffic within specific bandwidth limits)
Drop
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Update DSCP
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Update 802.1p
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Drop precedence choice of low-drop, high-drop or use egress map
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•
Out-of-profile actions (metered traffic exceeding bandwidth limits)
Drop
o
Update DSCP
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Set drop precedence
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•
Non-Match actions (non-metered traffic)
Drop
o
Update DSCP
o
Update 802.1p
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Drop precedence choice of low-drop or high-drop
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Metering data includes in-profile and out-of-profile actions with metered bandwidth allocated per
port. Each meter has its own token bucket that controls the rate at which packets are accepted for
processing at ingress. The committed information rate (CIR) and bucket sizes are as follows:
Committed rate from 1 Mbps to 1 Gbps in 1 Mbps increments, 64K to 1 Gbps in 64K for
o
ERS5530 only with 10/100/1000 Mbps interfaces – please see table 6 below for details
Token bucket sizes in bytes: 16K, 20K, 32K, 44K, 76K, 140K, 268K, 512K where one
o
byte is sent for each token
Up to 63 counters are available per port
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Statistics
The Ethernet Routing Switch 5500 supports tracking of statistics (packet counters) for the policies
defined. The switch can be set-up for one counter for each classifier or a counter for all classifiers
associated with a policy up to 63 counters are available per port. The statistics track match/in-
profile and out-of-profile statistics associated with a meter.
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