Mailing List Archive

Hi

On Wed, Jul 18, 2012 at 12:10:48PM +0300, Liviu Pislaru wrote:
> I don't know if this is the right place to ask this but i'll give it a try:
> Does anyone knows if there is any SNMP OID for IPv6 traffic on CISCO
> 7600. I've deeply searched for this information, i've tried different
> version on IOS (SRCx, SRDx) but without any luck. It seems like there is
> no counter on CISCO 7600 for inbound v6 traffic (forwarded traffic not
> control-plane).

The sup720 hardware has no counters for hw-forwarded IPv6 traffic.

You can see some numbers with "show interface accounting", but that's
actually lying to you - the "IPv6" packets are "control plane or
cpu-forwarded", and IPv6 packets forwarded by hardware add up to the
"IP" counters.

(I've opened a TAC case on this, and all I got was "update documentation")

Supposedly the Sup2T can do better.

Gert Doering
-- NetMaster
--
have you enabled IPv6 on something today...?

SpaceNet AG Vorstand: Sebastian v. Bomhard
Joseph-Dollinger-Bogen 14 Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen HRB: 136055 (AG Muenchen)
Tel: +49 (89) 32356-444 USt-IdNr.: DE813185279

Hi Gert,

I agree that i can only see control-plane inbound traffic with "show
interface accounting". I also think that when i would be able to see
hw-forwarded traffic with this command the problem with SNMP OID would
be also solved.

I only hope is not some hardware limitation on SUP720 or RSP720.
Maybe someone from CISCO can give us more details.

--
Liviu.

On 07/18/12 12:15, Gert Doering wrote:
> Hi
>
> On Wed, Jul 18, 2012 at 12:10:48PM +0300, Liviu Pislaru wrote:
>> I don't know if this is the right place to ask this but i'll give it a try:
>> Does anyone knows if there is any SNMP OID for IPv6 traffic on CISCO
>> 7600. I've deeply searched for this information, i've tried different
>> version on IOS (SRCx, SRDx) but without any luck. It seems like there is
>> no counter on CISCO 7600 for inbound v6 traffic (forwarded traffic not
>> control-plane).
> The sup720 hardware has no counters for hw-forwarded IPv6 traffic.
>
> You can see some numbers with "show interface accounting", but that's
> actually lying to you - the "IPv6" packets are "control plane or
> cpu-forwarded", and IPv6 packets forwarded by hardware add up to the
> "IP" counters.
>
> (I've opened a TAC case on this, and all I got was "update documentation")
>
> Supposedly the Sup2T can do better.
>
> Gert Doering
> -- NetMaster

Hi,

On Wed, Jul 18, 2012 at 12:26:58PM +0300, Liviu Pislaru wrote:
> I agree that i can only see control-plane inbound traffic with "show
> interface accounting". I also think that when i would be able to see
> hw-forwarded traffic with this command the problem with SNMP OID would
> be also solved.
>
> I only hope is not some hardware limitation on SUP720 or RSP720.
> Maybe someone from CISCO can give us more details.

Uh. Please read what I wrote:

> On 07/18/12 12:15, Gert Doering wrote:
> > The sup720 hardware has no counters for hw-forwarded IPv6 traffic.

which very definitely is a hardware limitation.

Gert Doering
-- NetMaster
--
have you enabled IPv6 on something today...?

SpaceNet AG Vorstand: Sebastian v. Bomhard
Joseph-Dollinger-Bogen 14 Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen HRB: 136055 (AG Muenchen)
Tel: +49 (89) 32356-444 USt-IdNr.: DE813185279

in that case, there is nothing to be done.
are you expecting anything else to happen regarding the TAC case ?
are you still optimistic ?

--
liviu.

On 07/18/12 12:29, Gert Doering wrote:
> Hi,
>
> On Wed, Jul 18, 2012 at 12:26:58PM +0300, Liviu Pislaru wrote:
>> I agree that i can only see control-plane inbound traffic with "show
>> interface accounting". I also think that when i would be able to see
>> hw-forwarded traffic with this command the problem with SNMP OID would
>> be also solved.
>>
>> I only hope is not some hardware limitation on SUP720 or RSP720.
>> Maybe someone from CISCO can give us more details.
> Uh. Please read what I wrote:
>
>> On 07/18/12 12:15, Gert Doering wrote:
>>> The sup720 hardware has no counters for hw-forwarded IPv6 traffic.
> which very definitely is a hardware limitation.
>
> Gert Doering
> -- NetMaster

On 07/18/2012 10:10 AM, Liviu Pislaru wrote:
> hi,
>
> I don't know if this is the right place to ask this but i'll give it a try:

It's not really. cisco-nsp would be better, since it's a Cisco-specific
question.

> Does anyone knows if there is any SNMP OID for IPv6 traffic on CISCO

As Gert has said, there isn't. Can't be done. Impossible.

> As an workaround, i use dot1q subinterfaces between Cisco7600 routers
> for v4 and v6 traffic but this is not always applicableat the edge of
> the network (CDN, PNI, etc.)

One other workaround is:

1. Use a QoS policy map on the interface matching all IPv6 traffic
2. Enable QoS statistics export

This is a neat trick which we've used successfully. It has limits, and
requires you enable QoS on the platform which opens a whole bunch more
things to think about. But it does get you IPv6 traffic per-interface.
I'm not sure if you can get the counters via SNMP though.

Hi,

On Wed, Jul 18, 2012 at 12:37:00PM +0300, Liviu Pislaru wrote:
> in that case, there is nothing to be done.
> are you expecting anything else to happen regarding the TAC case ?
> are you still optimistic ?

the case has been closed long ago - "this was a documentation problem and
has been resolved".

Of course I'm not happy, but if the hardware can not do it, there is not
much TAC can do about it.

Gert Doering
-- NetMaster
--
have you enabled IPv6 on something today...?

SpaceNet AG Vorstand: Sebastian v. Bomhard
Joseph-Dollinger-Bogen 14 Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen HRB: 136055 (AG Muenchen)
Tel: +49 (89) 32356-444 USt-IdNr.: DE813185279

On Wed, 18 Jul 2012, Liviu Pislaru wrote:

> Does anyone knows if there is any SNMP OID for IPv6 traffic on CISCO 7600.

No, but you can do netflow v9 export to a collector, I use NfSen/Nfdump
for that.

Cheers
James

Am 7/18/12 11:15 AM, schrieb Gert Doering:
> Hi
>
> On Wed, Jul 18, 2012 at 12:10:48PM +0300, Liviu Pislaru wrote:
>> I don't know if this is the right place to ask this but i'll give it a try:
>> Does anyone knows if there is any SNMP OID for IPv6 traffic on CISCO
>> 7600. I've deeply searched for this information, i've tried different
>> version on IOS (SRCx, SRDx) but without any luck. It seems like there is
>> no counter on CISCO 7600 for inbound v6 traffic (forwarded traffic not
>> control-plane).
>
> The sup720 hardware has no counters for hw-forwarded IPv6 traffic.
>
> You can see some numbers with "show interface accounting", but that's
> actually lying to you - the "IPv6" packets are "control plane or
> cpu-forwarded", and IPv6 packets forwarded by hardware add up to the
> "IP" counters.
>
> (I've opened a TAC case on this, and all I got was "update documentation")
>
> Supposedly the Sup2T can do better.

The Sup2T has 8 hardware counters per interface:
IPv4 in
IPv4 out
IPv4 + IPv6 multicast in
IPv4 + IPv6 multicast out
IPv6 in
IPv6 out
MPLS in
MPLS out

Example from one of our routers with "show interface details":

Additional Counters:
IPv4 in Switched: ucast: 232026083769 pkt, 148847946714671 bytes
IPv6 in Switched: ucast: 9050302605 pkt, 9415087298170 bytes
IPv4 + IPv6 in Switched: mcast: 0 pkt, 0 bytes
MPLS in Switched: 0 pkt, 0 bytes
IPv4 out Switched: ucast: 405745004714 pkt, 436152461768595 bytes
IPv6 out Switched: ucast: 6604380583 pkt, 3274803027618 bytes
IPv4 + IPv6 out Switched: mcast: 0 pkt, 0 bytes
MPLS out Switched: 0 pkt, 0 bytes
241476439140 packets input, 158295295704756 bytes, 0 no buffer
Received 310796695 broadcasts (2 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
412421724492 packets output, 439439372700949 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out

I don't know if they're available via SNMP though.

Regards,
Chris

SWITCH
Serving Swiss Universities
--------------------------
Chris Welti, Network Engineer
Werdstrasse 2, P.O. Box, 8021 Zurich, Switzerland
phone +41 44 268 15 30, fax +41 44 268 15 68
chris.welti@switch.ch
http://www.switch.ch

Brocade's MLXe has separate IPv4 and IPv6 octet and packet counters in their
own MIB -- works great.

Frank

-----Original Message-----
From: ipv6-ops-bounces+frnkblk=iname.com@lists.cluenet.de
[mailto:ipv6-ops-bounces+frnkblk=iname.com@lists.cluenet.de] On Behalf Of
Chris Welti
Sent: Thursday, July 19, 2012 8:16 AM
To: Gert Doering
Cc: Liviu Pislaru; ipv6-ops@lists.cluenet.de
Subject: Re: SNMP OID for IPv6 traffic

Am 7/18/12 11:15 AM, schrieb Gert Doering:
> Hi
>
> On Wed, Jul 18, 2012 at 12:10:48PM +0300, Liviu Pislaru wrote:
>> I don't know if this is the right place to ask this but i'll give it a
try:
>> Does anyone knows if there is any SNMP OID for IPv6 traffic on CISCO
>> 7600. I've deeply searched for this information, i've tried different
>> version on IOS (SRCx, SRDx) but without any luck. It seems like there is
>> no counter on CISCO 7600 for inbound v6 traffic (forwarded traffic not
>> control-plane).
>
> The sup720 hardware has no counters for hw-forwarded IPv6 traffic.
>
> You can see some numbers with "show interface accounting", but that's
> actually lying to you - the "IPv6" packets are "control plane or
> cpu-forwarded", and IPv6 packets forwarded by hardware add up to the
> "IP" counters.
>
> (I've opened a TAC case on this, and all I got was "update documentation")
>
> Supposedly the Sup2T can do better.

The Sup2T has 8 hardware counters per interface:
IPv4 in
IPv4 out
IPv4 + IPv6 multicast in
IPv4 + IPv6 multicast out
IPv6 in
IPv6 out
MPLS in
MPLS out

Example from one of our routers with "show interface details":

Additional Counters:
IPv4 in Switched: ucast: 232026083769 pkt, 148847946714671 bytes
IPv6 in Switched: ucast: 9050302605 pkt, 9415087298170 bytes
IPv4 + IPv6 in Switched: mcast: 0 pkt, 0 bytes
MPLS in Switched: 0 pkt, 0 bytes
IPv4 out Switched: ucast: 405745004714 pkt, 436152461768595 bytes
IPv6 out Switched: ucast: 6604380583 pkt, 3274803027618 bytes
IPv4 + IPv6 out Switched: mcast: 0 pkt, 0 bytes
MPLS out Switched: 0 pkt, 0 bytes
241476439140 packets input, 158295295704756 bytes, 0 no buffer
Received 310796695 broadcasts (2 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
412421724492 packets output, 439439372700949 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 PAUSE output
0 output buffer failures, 0 output buffers swapped out

I don't know if they're available via SNMP though.

Regards,
Chris

SWITCH
Serving Swiss Universities
--------------------------
Chris Welti, Network Engineer
Werdstrasse 2, P.O. Box, 8021 Zurich, Switzerland
phone +41 44 268 15 30, fax +41 44 268 15 68
chris.welti@switch.ch
http://www.switch.ch