05-23-2002 10:46 AM - edited 03-01-2019 09:51 PM
I am troubleshooting a problem with very little success. I have a VLAN located on a MSFC2. In smalls burst about every so often I see the input queue drops jump quite a bit. Any other time the queue is 0/75. I did some show commands but I'm affraid that I need some help looking through them. Below is an out put of some commands. I don't know if the cause is broadcast traffic or maybe I don't have MLS set up right. Normally we don't have a lot of traffic on our network, and I don't see any signs of bursty traffic however I keep getting alerts about my input queue on a Few of my VLANS. Please if you have any idea HELP!!!
Notice the bad hop count under the sho ip traffic command. Does this mean anything? Also check out UDP stats.
MSFC#sho int vlan21
Vlan21 is up, line protocol is up
Hardware is Cat6k RP Virtual Ethernet, address is 00d0.038b.77fc (bia 00d0.038
b.77fc)
Description: HSRP-AN1W-1-User-Community
Internet address is 172.**.**.**/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 02:02:01
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 136 drops
5 minute input rate 0 bits/sec, 1 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
10020 packets input, 869402 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
2812 packets output, 203949 bytes, 0 underruns
0 output errors, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
MSFC#
MSFC#
MSFC#
MSFC#sho ip traffic
IP statistics:
Rcvd: 112580562 total, 102170945 local destination
0 format errors, 0 checksum errors, 180710 bad hop count
385 unknown protocol, 0 not a gateway
0 security failures, 0 bad options, 172742 with options
Opts: 167 end, 0 nop, 0 basic security, 110 loose source route
0 timestamp, 0 extended security, 57 record route
0 stream ID, 0 strict source route, 172575 alert, 0 cipso
0 other
Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble
0 fragmented, 0 couldn't fragment
Bcast: 19331932 received, 11617 sent
Mcast: 79170263 received, 76008494 sent
Sent: 80082399 generated, 7403969 forwarded
Drop: 3661804 encapsulation failed, 0 unresolved, 0 no adjacency
12637 no route, 0 unicast RPF, 0 forced drop
ICMP statistics:
Rcvd: 0 format errors, 0 checksum errors, 1 redirects, 4603 unreachable
1297725 echo, 55 echo reply, 0 mask requests, 0 mask replies, 0 quench
0 parameter, 0 timestamp, 0 info request, 0 other
203 irdp solicitations, 0 irdp advertisements
Sent: 0 redirects, 20373 unreachable, 110 echo, 1297725 echo reply
0 mask requests, 0 mask replies, 0 quench, 0 timestamp
0 info reply, 67 time exceeded, 0 parameter problem
0 irdp solicitations, 0 irdp advertisements
UDP statistics:
Rcvd: 75011899 total, 2 checksum errors, 19345405 no port
Sent: 53191410 total, 24114 forwarded broadcasts
TCP statistics:
Rcvd: 36520 total, 0 checksum errors, 154 no port
Sent: 30264 total
Probe statistics:
Rcvd: 0 address requests, 0 address replies
0 proxy name requests, 0 where-is requests, 0 other
Sent: 0 address requests, 0 address replies (0 proxy)
0 proxy name replies, 0 where-is replies
PIMv2 statistics: Sent/Received
Total: 0/0, 0 checksum errors, 0 format errors
Registers: 0/0, Register Stops: 0/0, Hellos: 0/0
Join/Prunes: 0/0, Asserts: 0/0, grafts: 0/0
Bootstraps: 0/0, Candidate_RP_Advertisements: 0/0
IGMP statistics: Sent/Received
Total: 0/0, Format errors: 0/0, Checksum errors: 0/0
Host Queries: 0/0, Host Reports: 0/0, Host Leaves: 0/0
DVMRP: 0/0, PIM: 0/0
EGP statistics:
Rcvd: 0 total, 0 format errors, 0 checksum errors, 0 no listener
Sent: 0 total
IGRP statistics:
Rcvd: 0 total, 0 checksum errors
Sent: 0 total
OSPF statistics:
Rcvd: 27013994 total, 0 checksum errors
24576598 hello, 169 database desc, 9 link state req
1183010 link state updates, 35510 link state acks
Sent: 25542519 total
IP-IGRP2 statistics:
Rcvd: 0 total
Sent: 0 total
ARP statistics:
Rcvd: 24242764 requests, 251642 replies, 22 reverse, 0 other
Sent: 2830794 requests, 13733586 replies (13703577 proxy), 0 reverse
MSFC#
05-23-2002 11:49 AM
Is this a Sup1 or Sup2?? The MSFC only handles software switched packets, most packets are intended to be switched in hardware ASICs on the Supervisor. Therefore, something is causing the MSFC to get a burst of packets. What is configured under the VLAN 21 interface besides the IP address? Are you doing HSRP? Have you check to see if this may be related to Asymmetric Routing?
By default, MLS will run on the Sup1/MSFC2. Unless you have changed the config, it should be functioning correctly.
05-23-2002 12:24 PM
It's a MSFC2. Running OSPF
Here's the config.
interface Vlan21
description HSRP-AN1W-1-User-Community
ip address 172.**.*.* 255.255.255.0
ip broadcast-address 172.**.**.255
ip helper-address 172.**.**.**
ip helper-address 172.**.**.**
no ip redirects
standby 1 timers 5 15
standby 1 priority 100 preempt
standby 1 ip 172.**.**.**
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