Subnetmask
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Hello and thank you in advance for any guidance.
Something 'simple' being a bit perplexing.
Standard network.
I have pfsense, netgate, on a typical network.
From Netgate to a switch.
I am simply adding another switch.
When connecting a computer to that new switch, the netmask shown on the computer adapter differs. From the existing switch or the Netgate, it will be the same, all is generally well. But on the new switch, it does not connect, as the netmask is different.My goal is 'simple' .. to satisfy this netmask difference so that computers can connect automatically with the switch without changing any settings on those computers.
It seems a 'simple' issue but to me, perplexing.
I appreciate any guidance that makes this no longer perplexing and running smoothly.
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There are 2 ways the subnet mask can be set, manually or via DHCP. Does that switch have a DHCP server? They generally don't. A switch should be transparent to that sort of thing.
Perhaps a little more info would help.
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The topic of 'looping' came up when I talked to someone yesterday.
Seems the network is acting strange. A user loses network just now, unknown why.
I was understanding one could use OPT1. In the meanwhile, things appear to be getting kaotic. -
User reboots, fine now.
Another user, I change to an existing connection used by another user, they are fine now.Something affecting existing lines is a little bit of a mystery.
One suggestion was to enable and run through OPT1 to the new switch.
Another suggestion was to set one of the LAN ports as discreet.In the beginning, I thought just adding a switch just passes through whatever was on the previous switch or router, not affecting the netmask.
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Without knowing more about what you're doing, it's hard to offer advice. However, it's unlikely a switch would cause that problem.
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Switches have ZERO to do with netmask and would have ZERO to do with a client getting a different one...
What switch? What exactly happens when you say the netmask changes!
And please READ MY SIGNATURE about sending me PM for help!!!
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@johnpoz Thank you for your reply Johnpoz. Yes, rightly said.
A machine connecting to the new switch, their adapter will 255.255.0.0 not 255.255.255.0
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And what is the IP they get, is it 169.254.x.x ? If so they are not getting an IP from dhcp and using APIPA.. Which uses a default mask of /16 or 255.255.0.0
If your saying they get an IP in your exact range - which is what 192.168.1/24, and the mask is wrong - that is just plain impossible unless some other dhcp server on the network handing out the same range with a different mask.
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@johnpoz Yes, like this. It is not getting the IP from the DHCP and using the APIPA. Just as you said, this is what is indeed happening. I don't recall what IP it was getting at that time, I bet it was something exactly as you wrote.
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I enabled the OPT1 port, it is set to DHCP, APIPA still takes place.
There appears more that I need to be setting.
The goal is to let the OPT1 port be DHCP and supply the network.I do like both of your taglines very much.
"I haven't lost my mind. It's around here...somewhere..."
"An intelligent man is sometimes forced to be drunk to spend time with his fools."
These are well put. I relate to these :-) -
Well, if you're getting a 169.254 address then you're not connecting to the rest of the network, including the DHCP server. Since inserting that switch causes the problem then you should start looking there, including bad cables.
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@macguyver2000 said in Subnetmask:
I enabled the OPT1 port, it is set to DHCP, APIPA still takes place.
There appears more that I need to be setting.
The goal is to let the OPT1 port be DHCP and supply the network.I do like both of your taglines very much.
"I haven't lost my mind. It's around here...somewhere..."
"An intelligent man is sometimes forced to be drunk to spend time with his fools."
These are well put. I relate to these :-)Plug a PC directly into the OPT1 port, does it work yes / no ?
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So lets see some details.. You setup what network on this opt1 interface? Which specific interface is this? Is it actually enabled? What range did you setup for the dhcp server?
And as mentioned - yes just plug a client into this interface does it get an IP? Do the lights come on on the interfaces?
Do we even know the cables are good your using? etc. etc..
What other switches do you have? How are they connected.. What specific hardware is this? Is this like a 3100 with switch ports?
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@JKnott A number of cables were used, with the same issue. Unless they are causing the common problem.
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@johnpoz OPT1 was enabled. I believe the range was set from .100 onward.
It unfortunately wasn't a go.When plugging into one of the ports, like the four lan, yes the switch will light for each one.
The cables that were made up, on use appeared they were good, as networking had carried across each one.
This would be the second switch of two. A Trend 8 port gig non peo switch. other is a Cisco switch. The device is the 3100 with switch ports.
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A 3100.. And what interface are you plugging the switch into?
The opt1 interface.. And if you plug in a device to this port, not your switch.. Does it work? Do you get lights, does it get dhcp?
Your not plugging the same switch into the lan ports and OPT1?
Post up your settings.. This is really clickly clickity shit,, it takes all of 30 seconds to setup.. So either you have something stupid missed, or your cable or switch is bad.. Or the port?
When you connect a device or switch to this port... Does pfsense show it come up and at what speed and duplex?
What actual interface do you have this new network assigned too? mvneta? 0,1, 2? Please post up your interface assignment page.
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@johnpoz There was some lines showing intermittent or no connect when plugged in directly. Yes, without the switch in line, things could work. Lan ports, not the Opt1. That had not worked.
I agree too, should be a quick thing, something silly missed, or a cable or switch failed. Although the vendor hasn't recalled a bad switch sold, they wondered if that was the problem.
Yes, when without the switch, and a working connection, it will show the speed and duplex.
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@macguyver2000 said in Subnetmask:
Yes, when without the switch, and a working connection, it will show the speed and duplex.
So your saying when you connect the switch pfsense does not show speed and duplex come up? If doesn't then no it would never work.
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@johnpoz directly, it got the speed and duplex.
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Well, if it works with a direct connection, but not through the switch, then there's a problem with the switch. Any chance it's a managed switch that's been misconfigured?
