CCNP TSHOOT Learning Guide/Chapter 7
From Teknologisk videncenter
Troubleshooting Addressing Solutions
Under Construction
Contents
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>Er CEF slået til på et interface:
Campus1#<input>show ip interface vlan 139</input>
Vlan139 is up, line protocol is up
Internet address is 192.168.139.1/24
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Helper addresses are 172.16.4.77
172.16.4.66
Directed broadcast forwarding is enabled
Multicast reserved groups joined: 224.0.0.1 224.0.0.2 224.0.0.22 224.0.0.13
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
<notice>IP CEF switching is enabled</notice>
IP CEF switching turbo vector
IP Null turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast, CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Probe proxy name replies are disabled
Policy routing is disabled
Network address translation is disabled
BGP Policy Mapping is disabled
Input features: MCI Check
Output features: Check hwidb
WCCP Redirect outbound is disabled
WCCP Redirect inbound is disabled
WCCP Redirect exclude is disabledTroubleshooting CEF
Campus1#<input>show ip cef</input>
Prefix Next Hop Interface
0.0.0.0/0 172.16.4.21 Vlan4
0.0.0.0/8 drop
0.0.0.0/32 receive
10.0.0.0/8 172.16.4.20 Vlan4
10.197.0.0/24 attached Vlan10
10.197.0.0/32 receive Vlan10
10.197.0.1/32 attached Vlan10
10.197.0.134/32 receive Vlan10
10.197.0.135/32 attached Vlan10
10.197.0.255/32 receive Vlan10
10.197.1.0/25 attached Vlan11
10.197.1.0/32 receive Vlan11
10.197.1.1/32 attached Vlan11
10.197.1.8/32 receive Vlan11
10.197.1.127/32 receive Vlan11
83.90.47.30/32 172.16.4.17 Vlan4
127.0.0.0/8 drop
172.16.0.0/12 172.16.4.20 Vlan4
172.16.4.103/32 attached Vlan4
172.16.4.107/32 attached Vlan4
172.16.4.230/32 attached Vlan4
172.16.4.231/32 attached Vlan4
172.16.4.233/32 attached Vlan4
172.16.4.234/32 attached Vlan4
172.16.4.255/32 receive Vlan4
172.16.40.0/24 192.168.139.3 Vlan139
192.168.0.0/16 172.16.4.20 Vlan4
192.168.138.0/24 192.168.139.37 Vlan139
192.168.139.0/24 attached Vlan139
192.168.139.0/32 receive Vlan139
192.168.139.1/32 receive Vlan139
192.168.139.2/32 attached Vlan139
192.168.139.11/32 attached Vlan139
192.168.150.0/24 192.168.139.28 Vlan139
217.198.220.140/32 192.168.139.51 Vlan139
224.0.0.0/4 multicast
224.0.0.0/24 receive
240.0.0.0/4 drop
255.255.255.255/32 receive