Cisco 3825 Software Configuration Guide - Page 238

show umts-iub packets Appendix A Cisco 3825 Mobile Wireless Edge Router RAN-O Command Reference show umts-iub packets To display packet statistics of the UMTS-Iub interface, use the show umts-iub packets command in privileged EXEC mode. show umts-iub packets Syntax Description This command has no arguments or keywords. Command Modes Privileged EXEC Command History Release 12.4(2)MR 12.4(4)MR Modification This command was introduced. The command output was modified to include information related to the exceeding of the Maximum Transmission Unit (MTU) of the backhaul link (see Note). Examples The following is an example of the output generated by this command. Router# show umts packets atm 0/1/0 UMTS-Iub(ATM0/1/0): packets: rxUMTS_count 288799 txUMTS_count 288799 rxUMTS_bytes 13862352 txUMTS_bytes 13862352 rxBackhaul_packets ========== 238484 txBackhaul_packets ========== 247328 rxBackhaul_bytes 156844691 txBackhaul_bytes 15736957 txBackhaul_pak_overrun ====== 0 Note The txBackhaul_pak_overrun line in the show umts packets command represents the number of times that the MTU of the backhaul link was exceeded. It does not indicate a major problem, nor does it indicate any loss of data. However, if you choose a umts backhaul-timer that is too large, then the amount of data that is available during that time period may exceed the allowed MTU of the backhaul causing 2 backhaul packets to be sent. This reduces the umts backhaul efficiency. The allowed MTU is 450 bytes for Multi-Link Point-to-Point Protocol (MLPPP) backhauls and for other backhaul interfaces, such as GE, the allowed MTU is the physical interface MTU less the backhaul packet overhead (which is approximately 4 bytes). A-106 Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide OL-15667-03