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02-10-2015 09:07 PM - last edited on 02-15-2015 09:22 PM by Maiko-I
02-10-2015 09:07 PM - last edited on 02-15-2015 09:22 PM by Maiko-I
1810 switch with large number of wireless clients
we have a public wifi system which plugs into a 1810-48G switch (J9660A). There is a Cisco 877 providing internet to this service
we are seeing numerous packets drop and it seems this switch is the culprit
We have a 2620 as available however this is used primarily for the phone system and is physically seperated for that reason.
I believe the amount of traffic going through the 1810 is exceeding its capacity however I have no way of confirming this.
any suggestions? Should we look at the 2620 instead or look at another switch to handle this traffic?
Thanks
P.S. This thread has been moved from ProCurve / ProVision-Based to Web and Unmanaged. - Hp Forum Moderator
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02-11-2015 09:30 PM
02-11-2015 09:30 PM
Re: 1810 switch with large number of wireless clients
Do you have a network monitoring product that can use SNMP to gather utilisation stats on the 1810 switchports?
Which interface on the 1810 is the Cisco 877 patched to?
WHat is this interface's configueration?
What is the Cisco's interface configuration?
Have a look at the "Port Summary" page on the 1810 and see what the interface has for "received packets with error" andf "collisions".
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02-11-2015 10:22 PM
02-11-2015 10:22 PM
Re: 1810 switch with large number of wireless clients
Hey,
I have just finished running up a demo of netflow analyser by mangeengine... if anyone wants to give me a quick rundown on what to do to get the 1810's in there that would be great, our ISP has configured the cisco and it is reporting to netflow successfully
I have attached a quick sketch of the configuration. All the wireless infrastructure is linked to a core switch via fibre links and connect to sfp.
All wireless clients are NATed, there are just short of 50 WAP's in use with up to 3000 clients throughout a 4-8 hour period.
The core switch links to the 1810 via fibre (SFP Port on the 1810) no VLANs or otherwise configured
The 1810 has another 1810 uplinked to it for other devices on the LAN
and the Cisco is connected via ethernet to the first 1810 where the fibre uplinks to.
They also have another switch (2620) that carries data and voice which has the voice VLAN'ed, the VLAN traffic is not sent via trunks to any of the other switches listed here.
When you ask about the interface config what do you mean? vlans? trunks and similar?
I can't get the cisco switch info easily i'll have to back trhough the owner of the router (ISP) to get that info
No errors/collisions on any ports on these switches.
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02-11-2015 11:07 PM
02-11-2015 11:07 PM
Re: 1810 switch with large number of wireless clients
OK, at least we have a diagram.
So which switchport on that diagram is showing the large numbers of dropped packets?
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02-11-2015 11:09 PM
02-11-2015 11:09 PM
Re: 1810 switch with large number of wireless clients
Your diagram should note switchport IDs against the end of each of the links displayed. Also, the port speed or bandwidth.
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02-11-2015 11:14 PM
02-11-2015 11:14 PM
Re: 1810 switch with large number of wireless clients
I've attached another diagram created by some software its not quite 100%, AP5.1 & 5.2 in this diagram plug into a switch which uplinks to the switch which the level 4 hub switch connects to
anyway another way of drawing what I've already provided
When I look at the management web portal for one of the 1810 there are appear to be no errors and no dropped packets on any switchport.
However when doing the ping tests from any machine plugged into that same switch destined for the switch, router or internet we have requent but intermittant drop packets. This is what has me stuffed, I was expecting to see errors on the port statistics, but nothing! This is what makes me think the switch can't handle the volume of packets coming through
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02-11-2015 11:19 PM
02-11-2015 11:19 PM
Re: 1810 switch with large number of wireless clients
this was done while in a bit of a rush so you'll have to excuse the lack of detail
all links between switches are gigabit (either ethernet or fibre)
the uplink between the 1810 and cisco 877 is a 100mbps ethernet
One thing I did just notice on the 1810 with the uplink to the core wireless switch (level 4 hub) was the interface kept going up and down in the port summary screen... Hadn't noticed this before but then wasn't specifically looking for it going up and down either since when looking at it, it was usually green.
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02-11-2015 11:36 PM
02-11-2015 11:36 PM
Re: 1810 switch with large number of wireless clients
That's strange. You might suspect that the switch isn't gathering stats properly.
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02-11-2015 11:39 PM
02-11-2015 11:39 PM
Re: 1810 switch with large number of wireless clients
I'm suspecting alot of things right now ;-)
I'd just like some direction to head in.
I have tried putting the uplink from the level4 hub to the other 1810 and even the 2620 but we still see dropped packets from machines. The users identify this pretty quickly as they use office 365 and outlook 2013 is pretty quick to announce to them that it's lost connectivity
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02-11-2015 11:39 PM
02-11-2015 11:39 PM
Re: 1810 switch with large number of wireless clients
If the link to the Cisco switch is 100Mb, and if that were fully utilised, you should see dropped packets on that interface, but you aren't.
Instead, you seem to have identified a flapping link, although that shouldn't be relevant to the PC on the 1810 that is trying to ping...?the 1810 itself?