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Symbols generated in Ping outputs

Ping Symbols
Symbol	Explanation
!	Indicate a Reply
.	Timeout
U	Destination Unreachable
Q	Source Quench (Destination too busy)
M	Could not Fragment
?	Unknown Packet type
&	Packet Lifetime Exceeded

Performing packetcaptures

SPAN Config

SW1(config)# <input>monitor session 1 source fastethernet 0/7</input>
SW1(config)# <input>monitor session 1 destination fastethernet 0/8</input>
SW1(config)# <input>end</input>
SW1# <input>show monitor</input>
Session 1
---------
Type               : Local Session
Source Ports       :
    Both           : fa0/7
Destination Ports  :
    Encapsulation  : Native
       Ingress : Disabled

RSPAN Config

Traffic Source

Monitor traffic on fa0/7 and send to VLAN 20 out of trunk gi0/3

SW1(config)# <input>vlan 20</input>
SW1(config-vlan)# <input>name RSPAN</input>
SW1(config-vlan)# <input>remote-span</input>
SW1(config-vlan)# <input>exit</input>
SW1(config)# <input>monitor session 1 source fastethernet 0/7</input>
SW1(config)# <input>monitor session 1 destination remote vlan 20 reflector-port gi0/3</input>
SW1(config)# <input>end</input>
SW1# <input>show monitor</input>
Session 1
---------
Type               : Remote Source Session
Source Ports       :
    Both           : fa0/7
Reflector Port     : Gi0/3
Dest RSPAN VLAN    : 20

Traffic Destination

Receive traffic on on trunk to remote-span VLAN 20 and send to fa0/12

SW1(config)# <input>vlan 20</input>
SW1(config-vlan)# <input>name RSPAN</input>
SW1(config-vlan)# <input>remote-span</input>
SW1(config-vlan)# <input>exit</input>
SW1(config)# <input>monitor session 1 source remote vlan 20</input>
SW1(config)# <input>monitor session 1 destination interface fa0/12</input>
SW1(config)# <input>end</input>
SW1# <input>show monitor</input>
Session 1
---------
Type               : Remote Destination Session
Source RSPAN VLAN  : 20
Destination ports  : fa0/12

Filtering output

Pipeline features

Include statement

Looking at the output below with more than 200 processes running. Its hard to sort out information.

T1#<input>show processes cpu</input>
CPU utilization for five seconds: 5%/0%; one minute: 5%; five minutes: 5%
 PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
   1           0        17          0  0.00%  0.00%  0.00%   0 Chunk Manager
   2         184    498119          0  0.00%  0.00%  0.00%   0 Load Meter
   3          57    249719          0  0.00%  0.00%  0.00%   0 OSPF Hello
   4     2036075    295159       6898  0.00%  0.06%  0.05%   0 Check heaps
   5           8         4       2000  0.00%  0.00%  0.00%   0 Pool Manager
   6           0         2          0  0.00%  0.00%  0.00%   0 Timers
   7      642424   3138677        204  0.00%  0.05%  0.00%   0 ARP Input
<notice>...OUTPUT OMITTED...</notice>
 201           0        37          0  0.00%  0.00%  0.00%   0 PDU DISPATCHER
 202          34        37        918  0.00%  0.00%  0.00%   0 SNMP ENGINE
 203           0         1          0  0.00%  0.00%  0.00%   0 SNMP ConfCopyPro
 204        7082     19564        361  0.00%  0.00%  0.00%   0 SNMP Traps
 205       98261   2959809         33  0.00%  0.00%  0.00%   0 NTP
 206           0        17          0  0.00%  0.00%  0.00%   0 hulc cfg mgr mas
 207       16502        82     201243  0.00%  0.00%  0.00%   0 hulc running con

If you now what your searching for. Use include - ala. Unix grep to sort lines including text.

T1#<input>show processes cpu | include Check heaps</input>
   4     2036226    295180       6898  0.15%  0.06%  0.05%   0 Check heaps

exclude statement

To many uninteresting lines in the output below.

T1#<input>show interfaces status</input>

Port      Name               Status       Vlan       Duplex  Speed Type
Gi0/1     link to room 111   connected    trunk        full   1000 10/100/1000BaseTX
Gi0/2                        disabled     1            auto   auto 10/100/1000BaseTX
Gi0/3                        disabled     1            auto   auto 10/100/1000BaseTX
Gi0/4                        disabled     1            auto   auto 10/100/1000BaseTX
Gi0/5                        disabled     1            auto   auto 10/100/1000BaseTX
Gi0/6                        disabled     1            auto   auto 10/100/1000BaseTX
Gi0/7                        disabled     1            auto   auto 10/100/1000BaseTX
Gi0/8     link to room 112   connected    trunk        full   1000 10/100/1000BaseTX
Gi0/9     link to room 113   connected    trunk        full   1000 10/100/1000BaseTX
Gi0/10                       disabled     1            auto   auto 10/100/1000BaseTX
Gi0/11                       disabled     1            auto   auto 10/100/1000BaseTX
Gi0/12                       disabled     1            auto   auto 10/100/1000BaseTX

Only show lines not containing disabled

T1#<input>show interfaces status | exclude disabled</input>

Port      Name               Status       Vlan       Duplex  Speed Type
Gi0/1     link to room 111   connected    trunk        full   1000 10/100/1000BaseTX
Gi0/8     link to room 112   connected    trunk        full   1000 10/100/1000BaseTX
Gi0/9     link to room 113   connected    trunk        full   1000 10/100/1000BaseTX

begin statement

If you know what your'e looking for, you can start the listing there.

T1#<input>sh run | begin router</input>
router ospf 1
 log-adjacency-changes
 network 192.168.1.0 0.0.0.255 area 0
 network 192.168.2.0 0.0.0.255 area 0
 network 192.168.3.0 0.0.0.255 area 0
 default-information originate
!

Section statement

From IOS version 12.3(2T)

show run | section router ospf

Regular Expressions

show processes cpu ! include ^CPU|IP Input

Redirect/append and tee

show tech-support | redirect tftp://192.168.1.2/show-tech.txt
show tech-support | append tftp://192.168.1.2/show-tech.txt
show tech-support | tee tftp://192.168.1.2/show-tech.txt

Show ip Route

show ip route 172.16.4.0 longer-prefixes

Navigation menu

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