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FTOS Configuration Guide for the C-Series - Force10 Networks

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You may do one or more <strong>for</strong> <strong>the</strong> following to optimize <strong>the</strong> E-<strong>Series</strong> <strong>for</strong> your multicast application:<br />

• Tune <strong>the</strong> Central Scheduler <strong>for</strong> Multicast on page 640<br />

• Allocate More Buffer Memory <strong>for</strong> Multicast WRED<br />

• Allocate More Bandwidth to Multicast using Egress WFQ<br />

Allocate More Buffer Memory <strong>for</strong> Multicast WRED<br />

Allocate more buffer memory to multicast WRED <strong>for</strong> bursty multicast traffic that might temporarily<br />

oversubscribe. For example, <strong>the</strong> configuration in Figure 406 allocates multicast traffic a minimum of 40<br />

megabytes (out of 80 megabytes) of buffer memory and up to 60 megabytes.<br />

Figure 449 Allocating More Bandwidth <strong>for</strong> Multicast WRED<br />

<strong>Force10</strong>(Conf)#queue egress multicast linecard all wred-profile Egress<br />

<strong>Force10</strong>(conf)#wred-profile Egress<br />

<strong>Force10</strong>(conf-wred)# threshold min 40960 max 61440<br />

Allocate More Bandwidth to Multicast using Egress WFQ<br />

Egress Weighted Fair Queuing (WFQ) determines per port <strong>the</strong> ratio of egress bandwidth allocated to<br />

multicast, replication, and unicast traffic. By default, <strong>FTOS</strong> provides 1/64 to multicast, 1/64 to replication,<br />

and 62/64 <strong>for</strong> unicast, which is shared between 8 unicast queues. Allocate more bandwidth <strong>for</strong> multicast<br />

using <strong>the</strong> command queue egress multicast linecard (from CONFIGURATION mode) with <strong>the</strong> keyword<br />

bandwidth-percent. For example, allocate 80% of egress bandwidth to multicast on all line cards using <strong>the</strong><br />

command queue egress multicast linecard all bandwidth-percent 80.<br />

<strong>FTOS</strong> <strong>Configuration</strong> <strong>Guide</strong>, version 7.7.1.0 639

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