06-13-2013 11:30 PM - edited 03-07-2019 01:53 PM
Hello,
Recently we have began to got a lot of packet-err on one of our ME3600.
#show controllers cpu-interface | include mcast
Queue packet jumbo packet-err jumbo-err dropped unfillcnt
-----------------------------------------------------------------------------------
sw forwarding 667 0 0 0 0 0
routing protocol 108719 0 0 0 0 0
icmp 129 116 0 0 0 0
host 321358 21998 0 0 0 0
acl logging 0 0 0 0 0 0
stp 1093107 0 0 0 0 0
l2 protocol 831733 0 0 0 0 0
mcast control 11554446 5459 104951 0 0 0
broadcast 883728 3 0 0 0 0
And with this messages we have got problems with multicast traffic, LDP, OSPF.
What does this errors mean?
Regards,
Konstantin
06-19-2013 10:14 PM
You have a very high amount of Multicats control traffic being recieved. I imagine you have high CPU and multicast packet drops leading to instability of your routing protocols. What code are you running and can you isolate what interface this traffic is ingressing on?
Thanks,
Dale
06-19-2013 11:38 PM
Hi Dale,
You are right.
I've found that one of our D-link (access) switches sends a lot of LLMNR protocol multicast packets with DIP 224.0.0.252 DMAC 0100.5e00.00fc. The problem was resolved when I restricted this traffic on D-link.
But there is one interesting thing happens if I try to hit this packets by MAC ACL filter on ME switches.
For example:
mac access-list extended LLMNR_MDNS
deny any host 0100.5e00.00fb
deny any host 0100.5e00.00fc
permit any any
!
int range gi0/20 - 22
mac access-group LLMNR_MDNS in
Whatever the packets with these MACs could reach CP of ME.
Jun 17 23:57:47: PKT(rx)[MCAST_CNTRLQ]: : PhyIf: Gi0/22 LogicaIf: Po1, oVlan:1483 L3IF: Vl1483
LT: UNKNOWN(0) tags: 1 vlanEdit: Pop1 DI: 0x8005136 EAID: 0x9150 MacDA: 0100.5e0
0.00fc, MacSA: 902b.3431.7530 Non (IPv4/IPv6/ARP/RARP)
RX-Nuclear-Header
[0] = 0xA4100236 [1] = 0x88005136 [2] = 0x00000000 [3] = 0x80ED9100
[4] = 0x010005CB [5] = 0x0C1605CB [6] = 0x00109150 [7] = 0x00000000
Jun 17 23:57:47: PKT(rx)[MCAST_CNTRLQ]: : PhyIf: Gi0/22 LogicaIf: Po1, oVlan:1483 L3IF: Vl1483
LT: UNKNOWN(0) tags: 1 vlanEdit: Pop1 DI: 0x8005136 EAID: 0x9150 MacDA: 0100.5e0
0.00fc, MacSA: 902b.3431.7530 Non (IPv4/IPv6/ARP/RARP)
RX-Nuclear-Header
[0] = 0xA4100236 [1] = 0x88005136 [2] = 0x00000000 [3] = 0x80ED9100
[4] = 0x010005CB [5] = 0x0C1605CB [6] = 0x00109150 [7] = 0x00000000
Jun 17 23:57:47: PKT(rx)[MCAST_CNTRLQ]: : PhyIf: Gi0/22 LogicaIf: Po1, oVlan:1483 L3IF: Vl1483
LT: UNKNOWN(0) tags: 1 vlanEdit: Pop1 DI: 0x8005136 EAID: 0x9150 MacDA: 0100.5e0
0.00fc, MacSA: 902b.3431.7530 Non (IPv4/IPv6/ARP/RARP)
RX-Nuclear-Header
[0] = 0xA4100236 [1] = 0x88005136 [2] = 0x00000000 [3] = 0x80ED9100
[4] = 0x010005CB [5] = 0x0C1605CB [6] = 0x00109150 [7] = 0x00000000
Does MAC ACL works for multicast traffic?
Regards,
Konstantin
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