Comtech EF Data CDM-570 - Manual (Page 327)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Ethernet IP Module - CLI and Telnet Operation MN/CDM570L.IOM
14–57
Selection Entry Description
Dropped – Bad IP Header
Checksum
[RO] Total Dropped Packets due to incorrect IP Header Checksum.
Dropped – Bad Buffer
Length
IP length (as specified in packet header) was greater than payload received in
the Ethernet packet. This would indicate the packet was truncated before
arriving.
Dropped – Bad IP Version Total Dropped IP Version 6 Packets (IP Module only supports IP Version 4).
Dropped – TTL Expired
Total Dropped Packets due to Time To Live counter expired (TTL limits the
number of hops, or seconds, before a packet reaches its destination).
Dropped – No Route
Total Dropped Packets due to no Route for the destination in the IP Module
Route Table. These are packets that are directed to the IP Module’s MAC
address and the IP Module will reply to the sender with a ICMP ‘Destination
net unreachable’ message.
Dropped – No ARP Entry
Total Dropped Packets due to no ARP entry in IP Module ARP Table.
For example, if an IP Module receives packets from the satellite for a host
that is not in the ARP table, the IP Module will send an ARP request. If there is
no response, the packets are dropped.
Dropped – Filtered
Multicast
Total Dropped Multicast Packets received from the satellite due to no
SAT
→LAN or
Dropped – Multicast
Disable Group
Multicast packet was dropped because, although route existed, IGMP is being
used, and there is no client requesting forwarding of this traffic or due to a
IGMP “leave group” message.
Dropped – Managed
Switch Multicast Option
Total Dropped Multicast Packets received from the satellite due to the
‘Managed Switch Multicast Option’ feature not being enabled in Managed
Switch Mode.
Dropped – Router Queue
Full
Indicates that the router task is dropping packets due to being full. Represents
a graceful drop process when the processor performance is being overdriven.
Dropped – Total Total Dropped Packets
Reset All Counters
C Execute this option to reset all gathered WAN, Ethernet and IP Routing
statistics gathered to zero.