Hey guys,
I've been running into an issue and wondering if anyone else has experienced the same problem. I have an ASR 9006 running IOS XR 5.3.3 in my lab and I've created a test bridge domain. Within that bridge domain, under the access circuit, I've configured a mac limit of 50 with the 'no flood' action. When this limit is hit, mac address learning is disabled as expected, but the problem is that its never re-enabled. If i stop all traffic on that interface, the mac learning remains disabled indefinitely until I change the configuration to either remove mac limiting or change the action to none. I would like to think that at some point it it would back off and re-enable mac learning after seeing that the mac address count has dropped below the threshold. Any ideas?
RP/0/RSP0/CPU0:LAB-ASR9006-01#sho l2vpn bridge-domain bd-name 9 det
AC: GigabitEthernet0/2/0/9.300, state is up
Type VLAN; Num Ranges: 1
VLAN ranges: [300, 300]
MTU 8986; XC ID 0x208000c; interworking none
MAC learning: disabled (MAC-limit action)
Flooding:
Broadcast & Multicast: enabled
Unknown unicast: disabled (MAC-limit action)
MAC aging time: 300 s, Type: inactivity
MAC limit: 50, Action: limit, no-flood, Notification: syslog
MAC limit reached: yes
MAC port down flush: enabled
MAC Secure: disabled, Logging: disabled
Split Horizon Group: none
Dynamic ARP Inspection: disabled, Logging: disabled
IP Source Guard: disabled, Logging: disabled
DHCPv4 snooping: disabled
IGMP Snooping: enabled
IGMP Snooping profile: none
MLD Snooping profile: none
Storm Control: bridge-domain policer
Static MAC addresses:
Statistics:
packets: received 1437063 (multicast 189407949, broadcast 44127, unknown unicast 0, unicast 0), sent 18
bytes: received 301982330 (multicast 40280180924, broadcast 3293496, unknown unicast 0, unicast 0), sent 1008
MAC move: 0
Storm control drop counters:
packets: broadcast 0, multicast 0, unknown unicast 0
bytes: broadcast 0, multicast 0, unknown unicast 0
Dynamic ARP inspection drop counters:
packets: 0, bytes: 0
IP source guard drop counters:
packets: 0, bytes: 0
RP/0/RSP0/CPU0:LAB-ASR9006-01#sho run l2vpn bridge group 9
Mon Feb 5 06:23:53.371 EST
l2vpn
bridge group 9
bridge-domain 9
mac
aging
time 300
!
withdraw state-down
!
mtu 9000
interface GigabitEthernet0/2/0/9.300
mac
limit
maximum 50
action no-flood
notification syslog
!
!
!
vfi 9
vpn-id 9
autodiscovery bgp
rd auto
route-target 9:9
!
neighbor 192.168.2.100 pw-id 91
!
neighbor 192.168.2.200 pw-id 91
!
!
routed interface BVI9
!
!
!
RP/0/RSP0/CPU0:LAB-ASR9006-01#sho l2vpn forwarding bridge-domain 9:9 loc 0/2/CPU0
Mon Feb 5 06:29:21.345 EST
Bridge MAC
Bridge-Domain Name ID Ports addr Flooding Learning State
-------------------------------- ------ ----- ------- -------- -------- ---------
9:9 0 4 0 Enabled Enabled UP
