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If your diagnosis shows a performance degradation with an ACL enabled, IP Unicast Hash mode may need to be changed from DA-only to SA-DA.
When you enable an ACL, the switch automatically sets hash mode for IP unicast traffic to SA-DA. Avaya recommends that you not change this setting unless changing it to DA-only greatly reduces the number of forwarding entries. For more information on the interrelationship of hash mode and specific ACL configurations, see Using Protocol or Port IDs in Access Rules.
SA-DA mode can cause a noticeable increase in the total flows identified and result in an increased usage of F-chip memory.
See "Managing F-chip Memory" in this case.
Important: Changing the Hash Mode setting affects every L3-enabled F-chip on the P580 or P882.
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