1. I notice that with the Real time graph running on a port, quite often the graph will calculate a negative number resulting in gaps in the graphs. Has anyone else experienced this? Is it expected?
2. The Arp Table output for my ports are blank. Does this feature work for you? If so, does anyone have this working with Arista switches?
Hi Aaron,
On Fri, 2012-11-16 at 10:40 -0800, Aaron Mayfield wrote:
- I notice that with the Real time graph running on a port, quite often the graph will calculate a negative number resulting in gaps in the graphs. Has anyone else experienced this? Is it expected?
Is this port by chance running a lot of traffic? As I understood from a conversation on IRC, the realtime poller is (currently) using regular 32bit counters instead of the 64bit high precision ones. You may be overflowing the counter confusing the script. Not much to do except try to patch it so it uses HC counters; but it needs some sort of fallback for devices that only have the 32bit ones :)
- The Arp Table output for my ports are blank. Does this feature work for you? If so, does anyone have this working with Arista switches?
Are you maybe confusing ARP table with Bridge MAC table?
I don't know if Arista exposes their layer 3 mac table. Fenestro on IRC may know :)
Tom
Yes, I had a brain glitch and was confusing ARP table with the MAC address table.
I thought wouldn't that be cool just to see which MAC address were learned on which ports, but I understand that in many networks there would just be too many MAC addresses to keep track of.
-----Original Message----- From: observium-bounces@observium.org [mailto:observium-bounces@observium.org] On Behalf Of Tom Laermans Sent: Friday, November 16, 2012 12:47 PM To: observium@observium.org Subject: Re: [Observium] A couple of questions on port details
Hi Aaron,
On Fri, 2012-11-16 at 10:40 -0800, Aaron Mayfield wrote:
- I notice that with the Real time graph running on a port, quite often the graph will calculate a negative number resulting in gaps in the graphs. Has anyone else experienced this? Is it expected?
Is this port by chance running a lot of traffic? As I understood from a conversation on IRC, the realtime poller is (currently) using regular 32bit counters instead of the 64bit high precision ones. You may be overflowing the counter confusing the script. Not much to do except try to patch it so it uses HC counters; but it needs some sort of fallback for devices that only have the 32bit ones :)
- The Arp Table output for my ports are blank. Does this feature work for you? If so, does anyone have this working with Arista switches?
Are you maybe confusing ARP table with Bridge MAC table?
I don't know if Arista exposes their layer 3 mac table. Fenestro on IRC may know :)
Tom
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On 16/11/2012 12:40, Aaron Mayfield wrote:
- I notice that with the Real time graph running on a port, quite often the graph will calculate a negative number resulting in gaps in the graphs. Has anyone else experienced this? Is it expected?
Umm. Some devices occasionally return bad numbers in SNMP, sometime SNMP counters aren't updated quickly enough and a graph point hits zero, followed by the next point being doubled. Irritating.
- The Arp Table output for my ports are blank. Does this feature work for you? If so, does anyone have this working with Arista switches?
The guy who wrote half of the Arista SNMP code is an Observium contributor, he can be found on our IRC channel and will be able to tell you if it should work or not :)
(I suspect it should, as he's very good at what he does and most SNMP features work better on Arista than any other device)
adam.
The one thing that I notice the Arista port detail seems to be missing is the VLAN details. On a cisco switch I can look at the VLAN tab and see what VLANs are active on the port and what spanning tree state they are in.
-----Original Message----- From: observium-bounces@observium.org [mailto:observium-bounces@observium.org] On Behalf Of Adam Armstrong Sent: Friday, November 16, 2012 1:32 PM To: Observium Network Observation System Subject: Re: [Observium] A couple of questions on port details
On 16/11/2012 12:40, Aaron Mayfield wrote:
- I notice that with the Real time graph running on a port, quite often the graph will calculate a negative number resulting in gaps in the graphs. Has anyone else experienced this? Is it expected?
Umm. Some devices occasionally return bad numbers in SNMP, sometime SNMP counters aren't updated quickly enough and a graph point hits zero, followed by the next point being doubled. Irritating.
- The Arp Table output for my ports are blank. Does this feature work for you? If so, does anyone have this working with Arista switches?
The guy who wrote half of the Arista SNMP code is an Observium contributor, he can be found on our IRC channel and will be able to tell you if it should work or not :)
(I suspect it should, as he's very good at what he does and most SNMP features work better on Arista than any other device)
adam. _______________________________________________ observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5398 - Release Date: 11/16/12
This is because I wrote the code specifically to parse the way Cisco do it :)
Writing code to extract the data for other devices is on the list...
adam.
On 16/11/2012 14:23, Aaron Mayfield wrote:
The one thing that I notice the Arista port detail seems to be missing is the VLAN details. On a cisco switch I can look at the VLAN tab and see what VLANs are active on the port and what spanning tree state they are in.
-----Original Message----- From: observium-bounces@observium.org [mailto:observium-bounces@observium.org] On Behalf Of Adam Armstrong Sent: Friday, November 16, 2012 1:32 PM To: Observium Network Observation System Subject: Re: [Observium] A couple of questions on port details
On 16/11/2012 12:40, Aaron Mayfield wrote:
- I notice that with the Real time graph running on a port, quite often the graph will calculate a negative number resulting in gaps in the graphs. Has anyone else experienced this? Is it expected?
Umm. Some devices occasionally return bad numbers in SNMP, sometime SNMP counters aren't updated quickly enough and a graph point hits zero, followed by the next point being doubled. Irritating.
- The Arp Table output for my ports are blank. Does this feature work for you? If so, does anyone have this working with Arista switches?
The guy who wrote half of the Arista SNMP code is an Observium contributor, he can be found on our IRC channel and will be able to tell you if it should work or not :)
(I suspect it should, as he's very good at what he does and most SNMP features work better on Arista than any other device)
adam. _______________________________________________ observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5398 - Release Date: 11/16/12
observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
The actual code is there, but it doesn't fit into the database I think so I didn't write that part ;) Unless that now changed recently...
Re mac bridge tables, I feel we should really fetch those at some point, we just don't, currently...
I could certainly use the info :P
Tom
On 16/11/2012 22:46, Adam Armstrong wrote:
This is because I wrote the code specifically to parse the way Cisco do it :)
Writing code to extract the data for other devices is on the list...
adam.
On 16/11/2012 14:23, Aaron Mayfield wrote:
The one thing that I notice the Arista port detail seems to be missing is the VLAN details. On a cisco switch I can look at the VLAN tab and see what VLANs are active on the port and what spanning tree state they are in.
-----Original Message----- From: observium-bounces@observium.org [mailto:observium-bounces@observium.org] On Behalf Of Adam Armstrong Sent: Friday, November 16, 2012 1:32 PM To: Observium Network Observation System Subject: Re: [Observium] A couple of questions on port details
On 16/11/2012 12:40, Aaron Mayfield wrote:
- I notice that with the Real time graph running on a port, quite
often the graph will calculate a negative number resulting in gaps in the graphs. Has anyone else experienced this? Is it expected?
Umm. Some devices occasionally return bad numbers in SNMP, sometime SNMP counters aren't updated quickly enough and a graph point hits zero, followed by the next point being doubled. Irritating.
- The Arp Table output for my ports are blank. Does this feature
work for you? If so, does anyone have this working with Arista switches?
The guy who wrote half of the Arista SNMP code is an Observium contributor, he can be found on our IRC channel and will be able to tell you if it should work or not :)
(I suspect it should, as he's very good at what he does and most SNMP features work better on Arista than any other device)
adam. _______________________________________________ observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5398 - Release Date: 11/16/12
observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
You guys should make the LLDP / CDP tables searchable since you already get the information anyway to build the connection maps etc.
That would be really helpful for finding devices :)
Would also be helpful to coordinate the mac tables with the ARP tables to relate an IP address to a physical port.
Thoughts?
Morgan
On Fri, Nov 16, 2012 at 1:57 PM, Tom Laermans tom.laermans@powersource.cxwrote:
The actual code is there, but it doesn't fit into the database I think so I didn't write that part ;) Unless that now changed recently...
Re mac bridge tables, I feel we should really fetch those at some point, we just don't, currently...
I could certainly use the info :P
Tom
On 16/11/2012 22:46, Adam Armstrong wrote:
This is because I wrote the code specifically to parse the way Cisco do it :)
Writing code to extract the data for other devices is on the list...
adam.
On 16/11/2012 14:23, Aaron Mayfield wrote:
The one thing that I notice the Arista port detail seems to be missing is the VLAN details. On a cisco switch I can look at the VLAN tab and see what VLANs are active on the port and what spanning tree state they are in.
-----Original Message----- From: observium-bounces@observium.**orgobservium-bounces@observium.org[mailto: observium-bounces@**observium.org observium-bounces@observium.org] On Behalf Of Adam Armstrong Sent: Friday, November 16, 2012 1:32 PM To: Observium Network Observation System Subject: Re: [Observium] A couple of questions on port details
On 16/11/2012 12:40, Aaron Mayfield wrote:
- I notice that with the Real time graph running on a port, quite
often the graph will calculate a negative number resulting in gaps in the graphs. Has anyone else experienced this? Is it expected?
Umm. Some devices occasionally return bad numbers in SNMP, sometime SNMP counters aren't updated quickly enough and a graph point hits zero, followed by the next point being doubled. Irritating.
- The Arp Table output for my ports are blank. Does this feature
work for you? If so, does anyone have this working with Arista switches?
The guy who wrote half of the Arista SNMP code is an Observium contributor, he can be found on our IRC channel and will be able to tell you if it should work or not :)
(I suspect it should, as he's very good at what he does and most SNMP features work better on Arista than any other device)
adam. ______________________________**_________________ observium mailing list observium@observium.org http://postman.memetic.org/**cgi-bin/mailman/listinfo/**observiumhttp://postman.memetic.org/cgi-bin/mailman/listinfo/observium
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participants (5)
-
Aaron Mayfield -
Adam Armstrong -
Morgan McLean -
Nikolay Shopik -
Tom Laermans