03-16-2006 06:30 AM - edited 03-09-2019 02:17 PM
Hi!
We are using a multipoint GRE tunnel to talk to several remote offices. The tunnel bandwidth is configured as 10Mbps and eigrp is working fine. However in the show interface command we are seeing output drops. Can any explain this and tell us how to correct the problem.
A sample sh interface is included and the configuration afterwards.
Tunnel0 is up, line protocol is up
Hardware is Tunnel
Internet address is 10.254.254.2/24
MTU 1514 bytes, BW 10000 Kbit, DLY 30000 usec,
reliability 255/255, txload 76/255, rxload 24/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 10.251.41.182 (GigabitEthernet0/1), destination UNKNOWN
Tunnel protocol/transport multi-GRE/IP, key 0x186A0, sequencing disabled
Checksumming of packets disabled, fast tunneling enabled
Tunnel transmit bandwidth 10000 (kbps)
Tunnel receive bandwidth 10000 (kbps)
Tunnel protection via IPSec (profile "AKER")
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/5/0 (size/max/drops/flushes); Total output drops: 11684
Queueing strategy: fifo
Output queue: 0/0 (size/max)
30 second input rate 952000 bits/sec, 1351 packets/sec
30 second output rate 3001000 bits/sec, 1156 packets/sec
8972105 packets input, 1224157724 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
5618944 packets output, 1420705323 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
INTERFACE CONFIG
interface Tunnel0
bandwidth 10000
ip address 10.254.254.2 255.255.255.0
no ip redirects
ip mtu 1400
ip nhrp authentication AK3r
ip nhrp map multicast dynamic
ip nhrp map multicast 85.19.41.158
ip nhrp map 10.254.254.1 85.19.41.158
ip nhrp network-id 100000
ip nhrp holdtime 600
ip nhrp nhs 10.254.254.1
no ip split-horizon eigrp 65108
load-interval 30
delay 3000
tunnel source GigabitEthernet0/1
tunnel mode gre multipoint
tunnel key 100000
tunnel protection ipsec profile AKER
tunnel bandwidth transmit 10000
tunnel bandwidth receive 10000
03-22-2006 07:08 AM
try a clear counters tunnel 0, and see. check the physical interface for clocking or CRC errors.
08-18-2006 06:11 AM
I have a GRE tunnel with the most basic possible config:
interface Tunnel0
description GRE tunnel
bandwidth 44210
ip address 172.X.X.X 255.255.255.252
delay 300
tunnel source VlanXX
tunnel destination 172.X.X.X
end
And I get:
#sh int tu 0
Tunnel0 is up, line protocol is up
Hardware is Tunnel
Description: GRE tunnel
Internet address is 172.X.X.X/30
MTU 1514 bytes, BW 44210 Kbit, DLY 3000 usec,
reliability 255/255, txload 4/255, rxload 6/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 172.X.X.X (VlanX), destination 172.X.X.X, fastswitch TTL 255
Tunnel protocol/transport GRE/IP, key disabled, sequencing disabled
Tunnel TTL 255
Checksumming of packets disabled, fast tunneling enabled
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 23:55:37
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 8069
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 1149000 bits/sec, 371 packets/sec
5 minute output rate 707000 bits/sec, 336 packets/sec
58820854 packets input, 48610644839 bytes, 0 no buffer
Received 0 broadcasts (18610 IP multicast)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
40048814 packets output, 7858724201 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
==
I opened a TAC case about the drops and they were useless and indicated "GRE is not supported officailly so use at your own risk." I wish that guy would try to say that to my face.
=============
Tunnel is between 2 4507s running Version 12.2(20)EW, so that may be the problem.
=============
If anyone happens to know for sure that an IOS upgrade can help, I would appreciate the confirm.
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