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Cisco Bug: CSCvh92510 - Multiple WCCP SG's on L3 interfaces will NOT remove TCAM entry when CE connected interface is DOWN

Last Modified

Sep 19, 2019

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

8.3(0)SK(0.10)

Description (partial)

Symptom:
WCCP Redirect ACLs not getting removed after the CE interface goes down.

feature wccp
ip wccp 51 redirect-list WAE-REDIRECT-LIST
ip wccp 52 redirect-list WAE-REDIRECT-LIST-RETURN
ip wccp 61 redirect-list TEST-WAE-REDIRECT-LIST-RETURN
ip wccp 62 redirect-list TEST-WAE-REDIRECT-LIST

interface Ethernet3/23
ip wccp 51 redirect in
ip wccp 61 redirect in

interface eth3/23
shutdown


WCCP redirect ACL still exist. 
N7K1(config-if)# show system internal access-list interface ethernet 3/23 input statistics module 3

INSTANCE 0x0
---------------

  Tcam 0 resource usage:
  ----------------------
  Label_a = 0x801
   Bank 0
   ------
     IPv4 Class
       Policies: SPM WCCP()  [Merged]
       Netflow profile: 0
       Netflow deny profile: 0
       Entries:
         [Index] Entry [Stats]
         ---------------------
  [0017:50d32:0003] prec 0 redirect(0x20012)-routed tcp 10.38.192.251/32 10.160.76.80/32  [127697]
  [0018:50d52:0004] prec 0 redirect(0x20012)-routed tcp 10.38.188.68/32 10.160.76.80/32  [0]
  [0019:5c3a2:0005] prec 0 permit-routed tcp 0.0.0.0/0 0.0.0.0/0 eq 179 flow-label 179  [0]
  [001a:5c322:0006] prec 0 permit-routed tcp 0.0.0.0/0 0.0.0.0/0 eq 162 flow-label 162  [0]
  [001b:5c302:0007] prec 0 permit-routed tcp 0.0.0.0/0 0.0.0.0/0 eq 161 flow-label 161  [0]
  [001c:5c2a2:0008] prec 0 permit-routed tcp 0.0.0.0/0 0.0.0.0/0 eq 123 flow-label 123  [0]
  [001d:5c282:0009] prec 0 permit-routed tcp 0.0.0.0/0 0.0.0.0/0 eq 49 flow-label 49  [0]
  [001e:5c2e2:000a] prec 0 permit-routed tcp 0.0.0.0/0 0.0.0.0/0 range 22 23 flow-label 22  [0]
  [001f:5c1a2:000b] prec 0 permit-routed tcp 0.0.0.0/0 eq 179 0.0.0.0/0 flow-label 196608  [0]

Conditions:
Multiple WCCP SG ACL on Layer3 interface
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