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Cisco Bug: CSCuo85352 - QinQ subinterface counters NOT increment for non-Cisco ethertype packets

Last Modified

Sep 14, 2016

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S3 15.3(3)S1

Description (partial)

On ASR1K, Q-in-Q sub-interface counters in "show vlans" and ifMIB counters of Q-in-Q sub-interface will NOT increment for packets whose dot1q tunneling ethertype is non-Cisco-default type (0x88a8, 0x9100, 0x9200).

---
ASR1006#show run int G1/0/7
interface GigabitEthernet1/0/7
(snip)
 dot1q tunneling ethertype 0x9100   <<<

ASR1006#clear counters
Clear "show interface" counters on all interfaces [confirm] 
ASR1006#clear vlan statistics

### Sent 1000 ICMP request packets from N2X ###

ASR1006#show vlans
VLAN ID: 201 (IEEE 802.1Q Encapsulation)

   Protocols Configured:          Received:        Transmitted:
                     IP               1000                1000

VLAN trunk interfaces for VLAN ID 201:
GigabitEthernet1/0/7.2001
GigabitEthernet1/0/7.2001 (201/2001)
                     IP: 172.16.0.1
      Total 0 packets, 0 bytes input   <<< Not increment
      Total 0 packets, 0 bytes output
GigabitEthernet1/0/7.2002
GigabitEthernet1/0/7.2002 (201/2002)
                     IP: 172.16.1.1
      Total 0 packets, 0 bytes input
      Total 0 packets, 0 bytes output   <<< Not increment
----

Symptom:On ASR1K, Q-in-Q sub-interface counters in "show vlans" and ifMIB counters of Q-in-Q sub-interface will NOT increment for packets whose dot1q tunneling ethertype is non-Cisco-default type (0x88a8, 0x9100, 0x9200).

---
ASR1006#show run int G1/0/7
interface GigabitEthernet1/0/7
(snip)
 dot1q tunneling ethertype 0x9100   <<<

ASR1006#clear counters
Clear "show interface" counters on all interfaces [confirm] 
ASR1006#clear vlan statistics

### Sent 1000 ICMP request packets from N2X ###

ASR1006#show vlans
VLAN ID: 201 (IEEE 802.1Q Encapsulation)

   Protocols Configured:          Received:        Transmitted:
                     IP               1000                1000

VLAN trunk interfaces for VLAN ID 201:
GigabitEthernet1/0/7.2001
GigabitEthernet1/0/7.2001 (201/2001)
                     IP: 172.16.0.1
      Total 0 packets, 0 bytes input   <<< Not increment
      Total 0 packets, 0 bytes output
GigabitEthernet1/0/7.2002
GigabitEthernet1/0/7.2002 (201/2002)
                     IP: 172.16.1.1
      Total 0 packets, 0 bytes input
      Total 0 packets, 0 bytes output   <<< Not increment
----

Conditions:When dot1q tunneling ethertype is not cisco-default value.  (0x88a8, 0x9100, 0x9200)
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