Alcatel Carrier Internetworking Solutions Omni Switch/Router - Manual (Page 736)

Viewing IP Statistics and Errors
Page 25-14
PDUs Needing Reassembly
The number of IP datagram fragments that needed to be reassembled by this switch.
PDUs Successfully Reassembled
The number of IP datagrams successfully reassembled by this switch.
PDUs Needing Fragmentation
The number of IP datagrams requiring fragmentation by this switch.
Fragments created
The number of IP datagram fragments that have been generated as a result of fragmentation
by this switch.
Header errors
The number of input IP datagrams discarded due to errors in their IP header, including bad
checksums, version number mismatch, other format errors, time-to-live exceeded, errors
discarded in processing their IP options, etc.
Address errors
The number of input IP datagrams discarded because the IP header destination field
contained an invalid address.
Unknown/Unsupported Protocol
The number of local addresses, unsupported protocols, datagrams received successfully but
discarded because of an unknown or unsupported protocol.
Local discards inbound/outbound
The number of packets discarded, both inbound and outbound, though they had no errors to
prevent their being transmitted (lack of buffer space, etc.).
Unknown Route
The number of packets received and discarded by IP because IP was unable to route them.
Reassembly Failures
The number of failures detected by the IP reassembly algorithm for all reasons (timed out,
error, etc.) This value is not necessarily a count of the discarded fragments.
Fragmentation Failures
The number of IP datagrams discarded because they needed to be fragmented but could not
be. This situation could happen when a large packet has the “Don’t Fragment” flag set.