[cisco-voip] Trying to troubleshoot switch
Matthias Schaerer
matthias.schaerer at anyweb.ch
Sat Apr 28 10:21:18 EDT 2007
Scott,
Might be a broadcast storm, so finding the source of it would solve the
problem. I'd add storm-control commands to the user ports in order to see
if any of the devices sends large amounts of broadcast (maybe a loop of
some sort)
storm-control broadcast level 5.00 action shutdown
The command would shut down any port that sends more than 5 percent of
broadcast which is very high on a 100Mb interface. So you might find the
source. The other idea about changing the switch is also a good idea.
HTH
mat
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Matthias Schaerer
Network Engineer, Instructor
Mob: +41 79 419 4557
http://www.anyweb.ch - All you want to know about taking care of networks
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"Voll, Scott" <Scott.Voll at wesd.org>
Sent by: cisco-voip-bounces at puck.nether.net
27.04.2007 21:47
To: "cisco-voip at puck-nether.net" <cisco-voip at puck.nether.net>
cc:
Subject: [cisco-voip] Trying to troubleshoot switch
I'm really going to show how dumb I am but I'm too close to the problem.
I have a 3560 48 port 10/100 PoE switch that connects about 6 phone back
to an other 3560 via SX.
The switch / phones I'm having problems with keep loosing connections and
therefore the phones keep reseting.
I found the one switch with err-disable do to flapping. So I replaced the
SX and put it in a different Gig sfp slot.
Still having the issue.
Look to be a broadcast storm by the link lights. So I unplugged ports
until the lights went back to normal. Follow the cable back to a phone àPC. Plug it back in and the lights still looked fine.
telnet into the switch and I'm seeing the gig link Broadcast and multicast
increment at a rate of `100 per sec. NO other switch ports are
incrementing anywhere close to this.
Is this a bad switch? Do I have a bad run of fiber? What can I do to
trouble shoot more?
Scott
PS. Here is the conifg:
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname GeorgeFox
!
enable secret 5 <removed>
!
no aaa new-model
clock timezone PST -8
clock summer-time PDT recurring
ip subnet-zero
!
!
mls qos map cos-dscp 0 8 16 26 32 46 48 56
mls qos srr-queue input bandwidth 90 10
mls qos srr-queue input threshold 1 8 16
mls qos srr-queue input threshold 2 34 66
mls qos srr-queue input buffers 67 33
mls qos srr-queue input cos-map queue 1 threshold 2 1
mls qos srr-queue input cos-map queue 1 threshold 3 0
mls qos srr-queue input cos-map queue 2 threshold 1 2
mls qos srr-queue input cos-map queue 2 threshold 2 4 6 7
mls qos srr-queue input cos-map queue 2 threshold 3 3
mls qos srr-queue input dscp-map queue 1 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue input dscp-map queue 1 threshold 3 0 1 2 3 4 5 6 7
mls qos srr-queue input dscp-map queue 1 threshold 3 32
mls qos srr-queue input dscp-map queue 2 threshold 1 16 17 18 19 20 21 22
23
mls qos srr-queue input dscp-map queue 2 threshold 2 33 34 35 36 37 38 39
48
mls qos srr-queue input dscp-map queue 2 threshold 2 49 50 51 52 53 54 55
56
mls qos srr-queue input dscp-map queue 2 threshold 2 57 58 59 60 61 62 63
mls qos srr-queue input dscp-map queue 2 threshold 3 24 25 26 27 28 29 30
31
mls qos srr-queue input dscp-map queue 2 threshold 3 40 41 42 43 44 45 46
47
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 3 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 2
mls qos srr-queue output cos-map queue 4 threshold 2 1
mls qos srr-queue output cos-map queue 4 threshold 3 0
mls qos srr-queue output dscp-map queue 1 threshold 3 40 41 42 43 44 45
46 47
mls qos srr-queue output dscp-map queue 2 threshold 3 24 25 26 27 28 29
30 31
mls qos srr-queue output dscp-map queue 2 threshold 3 48 49 50 51 52 53
54 55
mls qos srr-queue output dscp-map queue 2 threshold 3 56 57 58 59 60 61
62 63
mls qos srr-queue output dscp-map queue 3 threshold 3 16 17 18 19 20 21
22 23
mls qos srr-queue output dscp-map queue 3 threshold 3 32 33 34 35 36 37
38 39
mls qos srr-queue output dscp-map queue 4 threshold 1
mls qos srr-queue output dscp-map queue 4 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue output dscp-map queue 4 threshold 3 0 1 2 3 4 5 6 7
mls qos queue-set output 1 threshold 1 138 138 92 138
mls qos queue-set output 1 threshold 2 138 138 92 400
mls qos queue-set output 1 threshold 3 36 77 100 318
mls qos queue-set output 1 threshold 4 20 50 67 400
mls qos queue-set output 2 threshold 1 149 149 100 149
mls qos queue-set output 2 threshold 2 118 118 100 235
mls qos queue-set output 2 threshold 3 41 68 100 272
mls qos queue-set output 2 threshold 4 42 72 100 242
mls qos queue-set output 1 buffers 10 10 26 54
mls qos queue-set output 2 buffers 16 6 17 61
mls qos
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface FastEthernet0/1
switchport access vlan 60
switchport voice vlan 160
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
priority-queue out
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
spanning-tree portfast
!
interface FastEthernet0/2 - 48
switchport access vlan 90
switchport voice vlan 160
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
priority-queue out
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
spanning-tree portfast
!
!
!
interface GigabitEthernet0/1 - 4
switchport trunk encapsulation dot1q
switchport mode trunk
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
queue-set 2
priority-queue out
mls qos trust cos
auto qos voip trust
!
interface Vlan1
no ip address
shutdown
!
interface Vlan60
ip address 10.200.6.4 255.255.255.0
!
ip classless
end
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