E5406zl Routing APR Cache Problem with Printers

[Markus Grill]

We have a E5406zl as Coreswitch. The switch is our Default-Gateway for all VLANs.

Everything is working fine, but sometimes some Printer are Offline. 

The Printer's are in the Subnet 172.17.20.xxx/24. The Subnet is the VLAN 5.

I can ping the printer with a PC in the VLAN. But when I ping the Printer from a other VLAN, then i become Request timeout.

The Workaround , Telnetsession to my E5406 (Default-Router), make a Ping to the Printer, and everthing is OK.

The same Error also occur, with this command:

#Telnet to E5406, then

clear arp

After this command, my printers are offline. Local Ping in the same subnet is OK. 

Regards

Markus

[paulgear]

I have seen this before, and i even ran into something quite similar the other day with my laptop. I haven't got an answer yet, but i suspect it might be due to a firewall issue on the PC side which causes ICMP redirects to be ignored until the gateway between the PC and the printer is present in the ARP cache.

[sduerig]

Hello 

We have the exact same Problem on multiple 2920 Switchs.

Do you have a solution?

Thanks

Sergio