CCNP TSHOOT Learning Guide/Chapter 7

Troubleshooting Addressing Solutions

Under Construction

High Router CPU Load

TCP Timers

Campus1#<input>show tcp statistics</input>
<notice>Rcvd: 1660766 Total, 389 no port</notice>
      35 checksum error, 0 bad offset, 0 too short
      745428 packets (14484748 bytes) in sequence
      1376 dup packets (106935 bytes)
      10 partially dup packets (14 bytes)
      4 out-of-order packets (385 bytes)
      0 packets (0 bytes) with data after window
      7 packets after close
      0 window probe packets, 4 window update packets
      156 dup ack packets, 0 ack packets with unsend data
      694031 ack packets (17499170 bytes)
<notice>Sent: 1654082 Total, 4 urgent packets</notice>
      236042 control packets (including 20049 retransmitted)
      695206 data packets (17505653 bytes)
      285 data packets (29786 bytes) retransmitted
      1 data packets (1 bytes) fastretransmitted
      693531 ack only packets (673691 delayed)
      0 window probe packets, 3 window update packets
<notice>2403 Connections initiated, 34096 connections accepted, 4630 connections established
36518 Connections closed (including 25214 dropped, 22 embryonic dropped)
20334 Total rxmt timeout, 0 connections dropped in rxmt timeout
0 Keepalive timeout, 2 keepalive probe, 0 Connections dropped in keepalive</notice>

Switching Path

Slå CEF til globalt

Router(config)#<input>ip cef</input>

Slå cef til på et interface

Router(config-if)#<input>ip route-cache cef</input>