Cabletron Systems MT8-MIM Specifikace stáhnout pdf (Strana 35)

Troubleshooting Guide 3-17

Failed RARP Requests (Got a MAC, need the IP):

The device (for example, an EMME) sends out a RARP request with its MAC address and uses the TID portion

of the packet to target the IP address of itself, 134.141.55.25. The RARP request will fail if the EMME RARPs

with a TID IP address of 0.0.0.0 rather than 134.141.55.25. Then the device will just reboot. If this is the

failure, you can ﬁx this in one of two ways: either re-assign the IP address at the device, via LM, or clear

NVRAM on the device. Then you must re-enter the IP address. (Clearing the NVRAM on the device is the less

painful of the two ﬁxes.)

Failed ARP Requests (Got an IP, need the MAC):

After the RARP is successful, the device will ARP with the server IP for the server’s MAC address. If the

server does not respond, it is probably because of the subnet mask. Make sure the target address in the packet is

targeting the server. The only remedy here is to try to set up another server.

Failed TFTP Read Request:

Please, can I read the ﬁle? Does the ﬁle exist? Do I have read privileges? Does a checksum reveal a good ﬁle?

Is this ﬁle for me (my device type)? You will see some explanation in the packet. “File not found” or checksum

error. These errors are intuitive. Sometimes the TFTP download will fail after it begins TFTP read requests and

TFTP data acknowledge. This could be a corrupt ﬁle that did not fail during the initial read.

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Cabletron Systems MT8-MIM Specifikace Strana 35