[cisco-voip] Trying to troubleshoot switch

Fri Apr 27 18:20:52 EDT 2007

Do you have multicast enabled for any of your music on hold sources?  If so,
this could be causing the high pps rate on your link.  If you don't have a
multicast router on the subnet (or if you have igmp snooping disabled) the
moh will be sent to all ports at 50 pps.

On 4/27/07, Voll, Scott <Scott.Voll at wesd.org> wrote:
>
>  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 5
>
> 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 4
>
> 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  8
>
> 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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>
>

-- 
kris seraphine
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