Cisco Nexus 5600 Series - Page 202

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Due to system limitations, the extent to which an ACL associated to SPAN session can scale depends
on the how the SPAN source is configured. The following table shows different scenarios and the
corresponding maximum ACL size supported.
These calculations assume that each ACE in the ACL results in one final TCAM entry.Note
Maximum ACL SizeScenario
Current Available TCAM Entries/2SPAN has single Switch Port as source with both
Tx and Rx.
Current Available TCAM Entries/3SPAN has multiple Switch Ports as source with
both Tx and Rx.
Current Available TCAM Entries/3SPAN has Port Channel (with one or more member
switch ports) as source with both Tx and Rx.
Current Available TCAM Entries/3SPAN has single HIF Ports as source with both Tx
and Rx.
Current Available TCAM Entries/4SPAN has multiple HIF Ports as source with both
Tx and Rx.
Current Available TCAM Entries/4SPAN has HIF Port Channel (with one or more
member HIF ports) as source with both Tx and Rx.
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The following scenarios are unaffected by any system limitations for ACL and SPAN session scaling:
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SPAN has single Switch Port as source with Tx only.
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SPAN has multiple Switch Ports as source with Tx only.
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SPAN has a Port Channel (with one or more member switch ports) as source with Tx only.
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SPAN has a single Host Interface (HIF) Port as source with Tx only.
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SPAN has multiple HIF Ports as source with Tx only.
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SPAN has a single Port HIF Channel (with one or more member HIF ports) as source with Tx
only.
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SPAN has a single Switch Port as source with Rx only.
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SPAN has multiple Switch Ports as source with Rx only.
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SPAN has a Port Channel (with one or more member switch ports) as source with Rx only.
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SPAN has a single HIF Ports as source with Rx only.
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SPAN has multiple HIF Ports as source with Rx only.
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SPAN has a HIF Port Channel (with one or more member HIF ports) as source with Rx only
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The following guidelines apply when configuring local SPAN sessions with ACLs:
Cisco Nexus 5600 Series NX-OS System Management Configuration Guide, Release 7.x
180 OL-31641-01
Configuring SPAN
Guidelines and Limitations for SPAN