We have MX204 that has high Output MTU under PFE statistics that just rebooted yesterday, comparing one of our MX that has been up for 8 months.
All interfaces on both MXs doesn't have alarming MTU errors in the interfaces so I am wondering where is this coming from...
cr1> show pfe statistics traffic | match MTU
Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU Error statistics:
Input Checksum : 0
Output MTU : 5187591
cr1> show system uptime | match up
5:12AM up 23:58, 2 users, load averages: 0.20, 0.24, 0.24
cr1>
Packet Forwarding Engine traffic statistics:
Input packets: 7426694578 36958 pps
Output packets: 7426693144 36458 pps
Fabric Input : 0 0 pps
Fabric Output : 0 0 pps
Packet Forwarding Engine local traffic statistics:
Local packets input : 8152388
Local packets output : 16567870
Software input control plane drops : 0
Software input high drops : 0
Software input medium drops : 0
Software input low drops : 0
Software output drops : 0
Hardware input drops : 0
Packet Forwarding Engine local protocol statistics:
HDLC keepalives : 0
ATM OAM : 0
Frame Relay LMI : 0
PPP LCP/NCP : 0
OSPF hello : 19756
OSPF3 hello : 0
RSVP hello : 36847
LDP hello : 0
BFD : 11
IS-IS IIH : 0
LACP : 171749
ARP : 684498
ETHER OAM : 0
Unknown : 0
Packet Forwarding Engine hardware discard statistics:
Timeout : 0
Truncated key : 0
Bits to test : 0
Data error : 0
TCP header length error : 0
Stack underflow : 0
Stack overflow : 0
Normal discard : 2271315474
Extended discard : 0
Invalid interface : 0
Info cell drops : 0
Fabric drops : 0
Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU Error statistics:
Input Checksum : 0
Output MTU : 5228064
cr2> show pfe statistics traffic | match MTU
Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU Error statistics:
Input Checksum : 0
Output MTU : 5161081
{master}
cr2> show system uptime | match up
5:16AM up 230 days, 15:43, 2 users, load averages: 0.77, 0.47, 0.38
cr2>
0> show pfe statistics traffic
Packet Forwarding Engine traffic statistics:
Input packets: 3077832159967 129123 pps
Output packets: 3075837726930 125731 pps
Fabric Input : 2389104751350 84328 pps
Fabric Output : 2389104751354 84327 pps
Packet Forwarding Engine local traffic statistics:
Local packets input : 1890900032
Local packets output : 3188281114
Software input control plane drops : 0
Software input high drops : 0
Software input medium drops : 0
Software input low drops : 0
Software output drops : 0
Hardware input drops : 0
Packet Forwarding Engine local protocol statistics:
HDLC keepalives : 0
ATM OAM : 0
Frame Relay LMI : 0
PPP LCP/NCP : 0
OSPF hello : 13071756
OSPF3 hello : 0
RSVP hello : 21459232
LDP hello : 0
BFD : 254245992
IS-IS IIH : 0
LACP : 39848945
ARP : 14283500
ETHER OAM : 0
Unknown : 4
Packet Forwarding Engine hardware discard statistics:
Timeout : 0
Truncated key : 0
Bits to test : 0
Data error : 0
TCP header length error : 0
Stack underflow : 0
Stack overflow : 0
Normal discard : 13203089923
Extended discard : 0
Invalid interface : 0
Info cell drops : 0
Fabric drops : 0
Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU Error statistics:
Input Checksum : 0
Output MTU : 5160406
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Leo Chan
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