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Cisco Bug: CSCvs09052 - ASR1K OTV: Incorrect MAC address count on EFP/BD QFP stats

Last Modified

Aug 25, 2020

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

16.6.2

Description (partial)

Symptom:
MAC address count on EFP/BD qfp stats do not correlate with actual MAC count.

QFP count should display dynamic (BD) + static (OTV) MAC address, but it might show abnormal MAC Count.

In the situation that QFP MAC count is close to the MAC limit, it can cause failures learning new MAC addresses. Following logs are seen:

%BDOMAIN-4-MAC_LIMIT_VIOL_INST_LIMIT: Attempt to learn a new MAC on Port-channel1 service instance 716 (bridge-domain 716) caused configured service instance limit (65536) to be exceeded.

Conditions:
ASR1K-OTV# show otv route vlan 716

Codes: BD - Bridge-Domain, AD - Admin-Distance,
       SI - Service Instance, * - Backup Route

OTV Unicast MAC Routing Table for Overlay1

 Inst VLAN BD     MAC Address    AD    Owner  Next Hops(s)
----------------------------------------------------------
<>
362 unicast routes displayed in Overlay1

----------------------------------------------------------
362 Total Unicast Routes Displayed

ASR1K-OTV#show bridge-domain 716 mac dynamic statistics 
Port                Dynamic-addr    
Po1 ServInst 716    83

ASR1K-OTV#show platform hardware qfp active feature  l2bd datapath bd 716 int Port-channel1.EFP716
QFP L2BD datapath interface information

Name: Port-channel1.EFP716
IF handle: 24, Input uidb: 65522
Flags: 0X000038
Split-horizon cfged: No, shg id: 0
STP state: Unknown/Bad
Mac security enabled: 
MAC limit: 65536, MAC learned: 65476   <<<<
BD PPE addr: 0X29A709E0
efp circuit id: 0
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