Specifications

UHP-1000 SATELLITE ROUTER
INSTALLATION AND OPERATION MANUAL, V. 2.5
(SW VERSION 2.5.X)
© ROMANTIS 2012 27 www.romantis.com
State - Current mode of communication with the switch.
TX - Queue length (in bytes) for transmission.
|-----+---- RX ----+---- TX ----+--------+------------|No buffer| 0 |
Two rows RX and TX in subsequent lines show statistics of reception and transmission.
No buffer - Number of packets reset from the queue due to excessive interface traffic in transmit
mode.
|Rate | 102 | 0 |Bcasts | 4127 |Collision| 0 |
Speed - Current traffic rate across interface.
Bcasts - Number of received broadcast packets.
Collision - Number of collisions in transmit half-duplex mode.
|Bytes| 315057 | 0 |CRC errs| 0 |16 colls.| 0 |
Bytes - Number of bytes (including Ethernet heading), that have passed through interface.
CRC errs - Number of packet checksum errors in receive mode.
16-colls - Number of multiple collisions. Means serious overload on the local network segment or
problems with the switch.
|Pkts.| 4127 | 0 |Overruns| 0 |Underruns| 0 |
Pkts - Number of packets that have passed through interface.
Overruns - Number of occasions when processor did not have enough time to process the received
packet.
Underruns - Number of occasions when processor did not have enough time to prepare data to send.
All counters can be reset using “clear counters ethernet” command.
2.4.1 ARP Protocol
ARP protocol assists devices on the Ethernet segment to communicate using IP-protocol. Addressing in Ethernet
differs from IP-addressing and ARP makes it possible to obtain peer MAC addresses in compliance with their IP-
addresses. The protocol is transparent for the user and does not require any configuration.
ARP Tables control commands:
arp timeout 30-3600 - ARP table purge interval
Sets interval (in seconds) between cleanups ARP Table. If IP-address is set on one device in the network and then
the device is disconnected from it and the same address is set on another device, the devices may fail to
communicate with this other device until their ARP Tables are cleaned and updated.
clear arp-table – Clean ARP Table.
show arp – Print current content of ARP Table:
Example:
UHP#sh arp
10.0.0.10 - 00:14:2A:7D:95:E9
10.0.0.11 - 00:12:34:56:2D:4E
10.0.0.12 – 00:12:34:56:53:55
An IP-address and its relevant MAC-address are shown on each line.
Free entries: 241 Purge interval 600
Free entries - Number of free cells in the Table.
Purge interval - Interval between Table updates.
ARP requests: 4 ARP answers: 0
ARP requests - Number of ARP requests generated by the router.
ARP answers - Number of router answers to ARP requests from the network.