Ip Routing; Time Source - CalAmp Viper 100 User Manual

1) Host A sends TCP data packet to Viper SC A.
2) Viper SC A transmits packet over the air to Viper SC B.
3) Viper SC B immediately responds with an RF acknowledgment and sends the TCP data packet to Host B.
4) Viper SC A hears an RF acknowledgement from Viper SC B and generates a TCP ACK to send to Host A. Host B
receives the original TCP data packet and generates a TCP ACK to send back over the network.
5) Viper SC B receives the TCP ACK but does not send it over the air saving bandwidth on the Airlink
― OIP Retries. Enter a value to specify the number of retries that the OIP layer will attempt if acknowledgement is not
received from the destination Viper. Default = 2. Retries are only enabled if Router mode is selected and RF ACK is
turned on. The number of retries should be increased if a there is a marginal RF path to another unit.
― Duplicate Packet Removal. Enables or disables the duplicate packet removal algorithm (by default it is disabled to
preserve compatibility with older versions of the firmware). This algorithm detects duplicate packets that might appear
through the system as a result of retransmissions.
― Quality of Service (QoS). Enables or disables the RF Quality of Service algorithm. Enabled by default, this algorithm
classifies data according to the local physical interface by which it enters the Viper to ensure that each interface
obtains a fair share of the RF bandwidth. When QoS is enabled, the "Setup Port" and "Data Port" are assigned 25%
each of the RF bandwidth; the "Ethernet Port" is assigned 50% of the RF bandwidth. When a port is not using its share
of the bandwidth, that portion is assigned to the other ports.
When QoS is disabled, the packets are transmitted over the RF interface on a first come, first served basis.

4.4.5 IP ROUTING

Figure 46 – IP Routing
― Routing Table. Displays the table of active IP routes. The routing table will be populated by the Neighbor Discovery
process (described in Section XXX) and/or by manual entry as shown in Section XXX.
o
Destination Network. Displays the IP Address and Netmask of a route.
o
Gateway. Displays the IP Address and the RF MAC address (if route is pointing to another Viper SC) of the
destination gateway.
o
Type. There are three different types of routes. Connected (direct physical connection on the Ethernet port), Static
(user-defined routes), and Proprietary (routes learned by the Viper SC unit that point to over-the-air destinations).
o
Routing Entries. This section allows the user to manually enter new routes or delete existing routes.
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4.4.6 TIME SOURCE

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