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FTOS Configuration Guide for the C-Series - Force10 Networks

FTOS Configuration Guide for the C-Series - Force10 Networks

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Display WRED Drop Statistics<br />

Display <strong>the</strong> number of packets <strong>FTOS</strong> dropped by WRED Profile using <strong>the</strong> command show qos statistics<br />

from EXEC Privilege mode, as shown in Figure 407.<br />

Figure 407 show qos statistics Command Example<br />

<strong>Force10</strong>#show qos statistics wred-profile<br />

Interface Gi 5/11<br />

Queue# Drop-statistic WRED-name Min Max Dropped Pkts<br />

0 Green WRED1 10 100 51623<br />

Yellow WRED2 20 100 51300<br />

Out of Profile 0<br />

1 Green WRED1 10 100 52082<br />

Yellow WRED2 20 100 51004<br />

Out of Profile 0<br />

2 Green WRED1 10 100 50567<br />

Yellow WRED2 20 100 49965<br />

Out of Profile 0<br />

3 Green WRED1 10 100 50477<br />

Yellow WRED2 20 100 49815<br />

Out of Profile 0<br />

4 Green WRED1 10 100 50695<br />

Yellow WRED2 20 100 49476<br />

Out of Profile 0<br />

5 Green WRED1 10 100 50245<br />

Yellow WRED2 20 100 49535<br />

Out of Profile 0<br />

6 Green WRED1 10 100 50033<br />

Yellow WRED2 20 100 49595<br />

Out of Profile 0<br />

7 Green WRED1 10 100 50474<br />

Yellow WRED2 20 100 49522<br />

Out of Profile 0<br />

<strong>Force10</strong>#<br />

<strong>FTOS</strong> Behavior: The C-<strong>Series</strong> fetches <strong>the</strong> per-queue packet count via class-maps. The count is <strong>the</strong><br />

number of packets matching <strong>the</strong> ACL entries in class-map. Every time <strong>the</strong> class-map or policy-map is<br />

modified, <strong>the</strong> ACL entries are re-written to <strong>the</strong> Forwarding Processor, and <strong>the</strong> queue statistics are<br />

cleared. This behavior is different from <strong>the</strong> E-<strong>Series</strong>. The E-<strong>Series</strong> fetches <strong>the</strong> packet count directly<br />

from counters at each queue, which allows queue statistics to persist until explicitly cleared via <strong>the</strong> CLI.<br />

Weighted Fair Queuing <strong>for</strong> Multicast and Unicast<br />

<strong>FTOS</strong> schedules unicast, multicast, and replication traffic <strong>for</strong> egress based on <strong>the</strong> Weighted Fair Queuing<br />

algorithm. The E-<strong>Series</strong> has 128 multicast queues per port-pipe, which are transparent, and eight unicast<br />

queues per port.<br />

For unicast queues you can:<br />

• Configure strict-priority <strong>for</strong> a queue using <strong>the</strong> command strict-priority from CONFIGURATION<br />

mode.<br />

576 Quality of Service

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