Cisco WAN :: ME-3400 Crashes When Unplugging Fiber Link?
Dec 15, 2010
As the subject suggests I have an issue with a ME-3400 that crashed when the fibre patch was pulled.
This is the reduced output from #show cpu proc
198 78753 213 369732 46.38% 37.30% 13.32% 0 IGMPSN L2MCM 213 21813 468 46608 11.23% 9.90% 3.69% 0 REP BPA/EPA Proc
Amongst other things this was pulled from #show log
Dec 15 11:01:38 WST: %SYS-2-CHUNKEXPANDFAIL: Could not expand chunk pool for REP Cam Flush . No memory available -Process= "Chunk Manager", ipl= 4, pid= 1-Traceback= D9BAA8 D9C1F4 1738F20 A6E77C A6524CDec 15 11:01:46 WST:
[Code].....
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[URL]
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---------------X-ALPHA-IDF-1FORMS-2960S-0# (SIDE)
!interface GigabitEthernet1/0/52description X-ALPHA-F-6509-0 uplinkswitchport trunk native vlan 18switchport mode trunksrr-queue bandwidth share 1 50 30 19priority-queue out mls qos trust dscpmacro description cisco-routerauto qos trust spanning-tree portfast disablespanning-tree guard loopip dhcp snooping trust!
-----------------X-ALPHA-F-6509-0# (SIDE)
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I have a problem at a place where 5 ME3400 switches are connected in a straight line. I can't do much about the topology of that place, but the problem is they are all DHCP Snooping, but uni cast replies from the dhcp server further up the hierarchy gets eaten by the first switch! I can't really see why it not only inspects in and whines about it not being for itself - it then drops the message.
What have we done wrong (apart from the actual layout of that place, which I can't really change)?
Sep 28 13:49:29: DHCP_SNOOPING: received new DHCP packet from input interface (GigabitEthernet0/1)
Sep 28 13:49:29: DHCP_SNOOPING: process new DHCP packet, message type: DHCPOFFER, input interface: Gi0/1, MAC da: 7444.012d.debd, MAC sa: 0013.1a4a.65c7, IP da: XX.YY.186.7, IP sa: XX.YY.186.1, DHCP ciaddr: 0.0.0.0, DHCP yiaddr: XX.YY.186.7, DHCP siaddr: 0.0.0.0, DHCP giaddr: 0.0.0.0, DHCP chaddr: 7444.012d.debd
Sep 28 13:49:29: DHCP_SNOOPING: binary dump of option 82, length: 20 data:
[Code] ......
It really should just send it on, as with any uni cast not on the switch itself - it should go out Gi0/2 really. Why isn't it?
[core] -- [sw1] -- [sw2] -- [sw3] -- [sw4] -- [sw5]
All the trunks are trusted, DAI is on (I've tried shutting it off, as well), port-security is used but it's actually not dying on the switch having the client computer, but the first one in the chain with dhcp snooping.
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