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тАО07-07-2009 10:27 PM
тАО07-07-2009 10:27 PM
2910al and older POS systems
Hello,
we have implemented some 2910al-48 PoE - switches at a customer. We replaced Cisco 2940 (10/100) switches with them.
Now we have the problem that some (older) POS systems (NICs: RTL8100C, RTL8139C and AMD PCNet AM79C970AKC) are loosing connectivity. Sometimes they work sometimes they don't. When I connect the to an old unmanaged 5-port 10/100 desktop-switch and connect this switch to the 2910al everything works fine. I have tested all different speed and duplex settings without success. When I ping the IP address of one POS-system and reboot it, I can see that about 5-6 pings are working after the POS-system has booted up and after that the pings are timing out.
The NICs are 10Mbit/s or 10/100Mbit/s but as I said, autonegotiation does not work and also manually defineing the speed does not solve the problem.
The POS-systems are booting a (old) MSDOS with TCPIP-stack.
Does anyone have these problems or better a solution?
Marco
we have implemented some 2910al-48 PoE - switches at a customer. We replaced Cisco 2940 (10/100) switches with them.
Now we have the problem that some (older) POS systems (NICs: RTL8100C, RTL8139C and AMD PCNet AM79C970AKC) are loosing connectivity. Sometimes they work sometimes they don't. When I connect the to an old unmanaged 5-port 10/100 desktop-switch and connect this switch to the 2910al everything works fine. I have tested all different speed and duplex settings without success. When I ping the IP address of one POS-system and reboot it, I can see that about 5-6 pings are working after the POS-system has booted up and after that the pings are timing out.
The NICs are 10Mbit/s or 10/100Mbit/s but as I said, autonegotiation does not work and also manually defineing the speed does not solve the problem.
The POS-systems are booting a (old) MSDOS with TCPIP-stack.
Does anyone have these problems or better a solution?
Marco
3 REPLIES 3
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тАО07-08-2009 08:38 AM
тАО07-08-2009 08:38 AM
Re: 2910al and older POS systems
connect straing true cable with pos device on switch interface 1 and write this command
switch(eth-1)# mdix-mode mdix
and make retest
switch(eth-1)# mdix-mode mdix
and make retest
cenk
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тАО07-08-2009 08:40 AM
тАО07-08-2009 08:40 AM
Re: 2910al and older POS systems
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тАО07-15-2009 12:38 AM
тАО07-15-2009 12:38 AM
Re: 2910al and older POS systems
Hi,
thanks for the reply, but I'm sorry it doesn'T solve our problem.
It's still the same ... I boot up the POS and I can ping it for 3-5 times than I can't ping it any more ..
Connecting it back to an old FastEthernet Miniswitch and everything works fine ...
Marco
thanks for the reply, but I'm sorry it doesn'T solve our problem.
It's still the same ... I boot up the POS and I can ping it for 3-5 times than I can't ping it any more ..
Connecting it back to an old FastEthernet Miniswitch and everything works fine ...
Marco
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