Hitachi GR2000 manual Packet Length

utilizes InverseARP protocol in compliance with RFC1293/RFC2390. Since InverseARP is not a mandatory requirement, certain products may not support it Consequently, there may be cases when the frping command issued from GR2000 ends in a timeout even the target device is in the reachable status.

4.5.2.4Conditions When Submitting Application Form to Frame Relay Network

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4.5.2.5Packet Length

If the MTU setting of GR2000 and that of the other end device is different, packet be relayed may sometimes be discarded. Specifically, such discarding of packets occurs on the receiving device whose MTU setting is smaller than that of the transmitting device. Make the MTU setting identical. For example, when you conn GR2000 with Cisco Systems’ routers, set the MTU of GR2000 to 1502, using the -max_packet_sizeoption of the dlci command. The MTU length used in IP fragment is -max_packet_size -2 of a dlci command. For the IP fragment, see the "Application Guide".