When I do a "show int" on my tunnel interface, I see a NEGATIVE queue size. Is this normal or am I seeing a bug in IOS?
Router#sho int tunnel1
Tunnel1 is up, line protocol is up
Hardware is Tunnel
Internet address is 172.16.14.2/30
MTU 1514 bytes, BW 600 Kbit, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source xxx.xx.xxx.xx (FastEthernet4), destination yyy.yyy.yy.yy
Tunnel protocol/transport GRE/IP, key disabled, sequencing disabled
Tunnel TTL 255
Checksumming of packets disabled, fast tunneling enabled
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:15:14
Input queue: -542544/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo (QOS pre-classification)
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1499 packets input, 148506 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
My tunnel config isn't anything special...
ip address 172.16.14.2 255.255.255.252
ip mtu 1400
ip pim sparse-dense-mode
tunnel source FastEthernet4
tunnel destination yyy.yyy.yy.yyy
Looks like a software defect. The closest that I was able to find is Bug ID CSCed86842.
I hope it helps.