Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[Jesse DuPont]

  
  
I think Cassidy's solution will fix your issue. By default, queuing
on a 3600 only allocates a percentage of port speed to class 0
traffic (untagged). His commands will grant 100% of port speed to
class 0 traffic.


  
  
  
  
  
  
  
  
  
  
  
  
  
Jesse DuPont

  Network
  Architect
  email: jesse.dup...@celeritycorp.net
  Celerity Networks LLC
  Celerity
  Broadband LLC
Like us! facebook.com/celeritynetworksllc
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On 4/14/16 7:50 PM, Craig Baird wrote:

I'll give it a try.  Thanks Cassidy.
  
  
  Craig
  
  
  
  Quoting "Cassidy B. Larson" :
  
  
  You might want to increase the queue limit
on your 1G interfaces.


We do this on our ASR920’s:


class-map match-any cos_all

 match cos  0  1  2  3  4  5  6  7

!

policy-map MC_1G_1M

 class cos_all

  bandwidth percent 100

  queue-limit 1024000 bytes

!

int g0/0/0

 service-policy output MC_1G_1M


Haven’t used M3600X’s before, but it depends on what the buffer
size of the total ports are, and probably how many ports are in
use as well..


-c



On Apr 14, 2016, at 2:28 PM, Craig Baird
   wrote:
  
  
  I've got a Cisco ME3600X switch connected up to a pair of
  Cambium PTP820S radios via gigabit fiber SFPs.  I'm seeing
  significant outdiscards, resulting in lost frames on the
  switch on both ports going to the 820S radios.  The links are
  not congested--generally pushing less than 100 Mbps (80 MHz
  channels, capable of 650 Mbps).  I've got other 820S radios
  connected to the same model switch in other places, and am not
  seeing this.  The only difference is that this switch is fed
  with 10 gig fiber.  I'm wondering if it's a queueing problem
  of some sort.  Anybody have any ideas?
  
  
  Craig
  
  
  



  
  
  
  


  

Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[Craig Baird]

I'll give it a try.  Thanks Cassidy.

Craig


Quoting "Cassidy B. Larson" :


You might want to increase the queue limit on your 1G interfaces.

We do this on our ASR920’s:

class-map match-any cos_all
 match cos  0  1  2  3  4  5  6  7
!
policy-map MC_1G_1M
 class cos_all
  bandwidth percent 100
  queue-limit 1024000 bytes
!
int g0/0/0
 service-policy output MC_1G_1M

Haven’t used M3600X’s before, but it depends on what the buffer size  
of the total ports are, and probably how many ports are in use as  
well..


-c



On Apr 14, 2016, at 2:28 PM, Craig Baird  wrote:

I've got a Cisco ME3600X switch connected up to a pair of Cambium  
PTP820S radios via gigabit fiber SFPs.  I'm seeing significant  
outdiscards, resulting in lost frames on the switch on both ports  
going to the 820S radios.  The links are not congested--generally  
pushing less than 100 Mbps (80 MHz channels, capable of 650 Mbps).   
I've got other 820S radios connected to the same model switch in  
other places, and am not seeing this.  The only difference is that  
this switch is fed with 10 gig fiber.  I'm wondering if it's a  
queueing problem of some sort.  Anybody have any ideas?


Craig

Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[Craig Baird]

Yes.  We've tried it both ways.  Same problem.

Craig


Quoting George Skorup :


Flow control enabled?

On 4/14/2016 3:28 PM, Craig Baird wrote:
I've got a Cisco ME3600X switch connected up to a pair of Cambium  
PTP820S radios via gigabit fiber SFPs.  I'm seeing significant  
outdiscards, resulting in lost frames on the switch on both ports  
going to the 820S radios.  The links are not congested--generally  
pushing less than 100 Mbps (80 MHz channels, capable of 650 Mbps).   
I've got other 820S radios connected to the same model switch in  
other places, and am not seeing this.  The only difference is that  
this switch is fed with 10 gig fiber.  I'm wondering if it's a  
queueing problem of some sort.  Anybody have any ideas?


Craig

Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[Craig Baird]

The Outdiscards are on the 1G interface, but of course all the traffic  
is coming from the 10G interface:


PortAlign-Err FCS-ErrXmit-Err Rcv-Err  UnderSize   
OutDiscards
Gi0/1   0   0   0   0  0
 0
Gi0/2   0   0   0   0  0
 41356
Gi0/3   0   1   0   1  0
  7168
Gi0/4   0   0   0   0  0
 0
Gi0/5   0   0   0   0  0
 0
Gi0/6   0   0   0   0  0
 0
Gi0/7   0   0   0   0  0
 0
Gi0/8   0   0   0   0  0
 0
Gi0/9   0   0   0   0  0
 0
Gi0/10  0   0   0   0  0
 0


Here's about 30 seconds later:

PortAlign-Err FCS-ErrXmit-Err Rcv-Err  UnderSize   
OutDiscards
Gi0/1   0   0   0   0  0
 0
Gi0/2   0   0   0   0  0
 41361
Gi0/3   0   1   0   1  0
  7168
Gi0/4   0   0   0   0  0
 0
Gi0/5   0   0   0   0  0
 0
Gi0/6   0   0   0   0  0
 0
Gi0/7   0   0   0   0  0
 0
Gi0/8   0   0   0   0  0
 0
Gi0/9   0   0   0   0  0
 0
Gi0/10  0   0   0   0  0
 0


G0/2 and G0/3 are both Cambium PTP820S links.  They are going to be a  
2+0 in a portchannel, but we are running them separately for now while  
we test this issue.  G0/3 is currently shut down.  As you can see,  
both are racking up OutDiscards.  G0/1 is a 1G link to another  
company's switch in the same building.  Obviously no problems there.


Thanks!

Craig



Quoting Sterling Jacobson <sterl...@avative.net>:


Outdiscards ingress from the 10G to the 1Gig?

It might discard if it's overflowing the buffer on the 1Gbps  
interface from the 10Gbps side.


That's not totally uncommon.

-Original Message-
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Craig Baird
Sent: Thursday, April 14, 2016 2:28 PM
To: af@afmug.com
Subject: [AFMUG] Outdiscards on Cisco switch with PTP820S

I've got a Cisco ME3600X switch connected up to a pair of Cambium  
PTP820S radios via gigabit fiber SFPs.  I'm seeing significant  
outdiscards, resulting in lost frames on the switch on both ports  
going to the 820S radios.  The links are not congested--generally

pushing less than 100 Mbps (80 MHz channels, capable of 650 Mbps).
I've got other 820S radios connected to the same model switch in  
other places, and am not seeing this.  The only difference is that  
this switch is fed with 10 gig fiber.  I'm wondering if it's a  
queueing problem of some sort.  Anybody have any ideas?


Craig

Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[Craig Baird]

Here are the port configs for both the 10G and 1G interfaces:



interface GigabitEthernet0/2
 description Radio Link #1
 switchport trunk allowed vlan 496,498,499,807,1998
 switchport mode trunk
 mtu 9216
 flowcontrol receive on


interface TenGigabitEthernet0/1
 description 10G Fiber backhaul
 switchport trunk allowed vlan 414,471,496,497,499,806
 switchport mode trunk
 mtu 9216

Thanks!

Craig



Quoting Eric Kuhnke :


Can you copy and paste the port configuration from a 'show run' on the
ME3600X?

On Thu, Apr 14, 2016 at 1:28 PM, Craig Baird  wrote:


I've got a Cisco ME3600X switch connected up to a pair of Cambium PTP820S
radios via gigabit fiber SFPs.  I'm seeing significant outdiscards,
resulting in lost frames on the switch on both ports going to the 820S
radios.  The links are not congested--generally pushing less than 100 Mbps
(80 MHz channels, capable of 650 Mbps).  I've got other 820S radios
connected to the same model switch in other places, and am not seeing
this.  The only difference is that this switch is fed with 10 gig fiber.
I'm wondering if it's a queueing problem of some sort.  Anybody have any
ideas?

Craig

Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[George Skorup]

Flow control enabled?

On 4/14/2016 3:28 PM, Craig Baird wrote:
I've got a Cisco ME3600X switch connected up to a pair of Cambium 
PTP820S radios via gigabit fiber SFPs.  I'm seeing significant 
outdiscards, resulting in lost frames on the switch on both ports 
going to the 820S radios.  The links are not congested--generally 
pushing less than 100 Mbps (80 MHz channels, capable of 650 Mbps).  
I've got other 820S radios connected to the same model switch in other 
places, and am not seeing this.  The only difference is that this 
switch is fed with 10 gig fiber.  I'm wondering if it's a queueing 
problem of some sort.  Anybody have any ideas?


Craig

Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[Cassidy B. Larson]

You might want to increase the queue limit on your 1G interfaces.

We do this on our ASR920’s:

class-map match-any cos_all
 match cos  0  1  2  3  4  5  6  7
!
policy-map MC_1G_1M
 class cos_all
  bandwidth percent 100
  queue-limit 1024000 bytes
!
int g0/0/0
 service-policy output MC_1G_1M

Haven’t used M3600X’s before, but it depends on what the buffer size of the 
total ports are, and probably how many ports are in use as well..

-c


> On Apr 14, 2016, at 2:28 PM, Craig Baird  wrote:
> 
> I've got a Cisco ME3600X switch connected up to a pair of Cambium PTP820S 
> radios via gigabit fiber SFPs.  I'm seeing significant outdiscards, resulting 
> in lost frames on the switch on both ports going to the 820S radios.  The 
> links are not congested--generally pushing less than 100 Mbps (80 MHz 
> channels, capable of 650 Mbps).  I've got other 820S radios connected to the 
> same model switch in other places, and am not seeing this.  The only 
> difference is that this switch is fed with 10 gig fiber.  I'm wondering if 
> it's a queueing problem of some sort.  Anybody have any ideas?
> 
> Craig
> 
> 

Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[Sterling Jacobson]

Outdiscards ingress from the 10G to the 1Gig?

It might discard if it's overflowing the buffer on the 1Gbps interface from the 
10Gbps side.

That's not totally uncommon.

-Original Message-
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Craig Baird
Sent: Thursday, April 14, 2016 2:28 PM
To: af@afmug.com
Subject: [AFMUG] Outdiscards on Cisco switch with PTP820S

I've got a Cisco ME3600X switch connected up to a pair of Cambium PTP820S 
radios via gigabit fiber SFPs.  I'm seeing significant outdiscards, resulting 
in lost frames on the switch on both ports going to the 820S radios.  The links 
are not congested--generally  
pushing less than 100 Mbps (80 MHz channels, capable of 650 Mbps).   
I've got other 820S radios connected to the same model switch in other places, 
and am not seeing this.  The only difference is that this switch is fed with 10 
gig fiber.  I'm wondering if it's a queueing problem of some sort.  Anybody 
have any ideas?

Craig

Re: [AFMUG] Outdiscards on Cisco switch with PTP820S

[Eric Kuhnke]

Can you copy and paste the port configuration from a 'show run' on the
ME3600X?

On Thu, Apr 14, 2016 at 1:28 PM, Craig Baird  wrote:

> I've got a Cisco ME3600X switch connected up to a pair of Cambium PTP820S
> radios via gigabit fiber SFPs.  I'm seeing significant outdiscards,
> resulting in lost frames on the switch on both ports going to the 820S
> radios.  The links are not congested--generally pushing less than 100 Mbps
> (80 MHz channels, capable of 650 Mbps).  I've got other 820S radios
> connected to the same model switch in other places, and am not seeing
> this.  The only difference is that this switch is fed with 10 gig fiber.
> I'm wondering if it's a queueing problem of some sort.  Anybody have any
> ideas?
>
> Craig
>
>
>

[AFMUG] Outdiscards on Cisco switch with PTP820S

[Craig Baird]

I've got a Cisco ME3600X switch connected up to a pair of Cambium  
PTP820S radios via gigabit fiber SFPs.  I'm seeing significant  
outdiscards, resulting in lost frames on the switch on both ports  
going to the 820S radios.  The links are not congested--generally  
pushing less than 100 Mbps (80 MHz channels, capable of 650 Mbps).   
I've got other 820S radios connected to the same model switch in other  
places, and am not seeing this.  The only difference is that this  
switch is fed with 10 gig fiber.  I'm wondering if it's a queueing  
problem of some sort.  Anybody have any ideas?


Craig