蘭亭休憩: Cisco command

telnet
1.exit
2.logout
3.disconnect 清除本使用者連線;後面可加連線號碼
4.clear 清除目前連進本設備的連線

#<ctrl +shift+6>x 暫停目前連線
#resume 1 回復telnet 連線 (連線編號)

show sessions
show users

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測試 cable 長度
6504-1#test cable-diagnostics tdr int gi 4/1

6504-1#sh cable-diagnostics tdr int gi 4/1

TDR test last run on: April 28 15:13:26
Interface Speed Pair Cable length Distance to fault Channel Pair status
------------ ----- ---- ------------------- ------------------- ------- ------------
Gi4/1 1000 1-2 1 +/- 20 m N/A Pair B Terminated
3-6 3 +/- 20 m N/A Pair A Terminated
4-5 4 +/- 20 m N/A Pair D Terminated
7-8 0 +/- 20 m N/A Pair C Terminated

cisco 6504 supervisor 2T 掛點
什麼東西都會壞

http://www.cisco.com/c/en/us/products/interfaces-modules/catalyst-6500-series-supervisor-engine-2t/index.html

目前比較新的switch都提供Time-Domain-Reflectometry(tdr)的功能
以方便管理人員可以初步由switch端回測到outlet
方便layer 1的查修
指令如下

cisco

#test cable tdr interface <interface of your choice>
Wait 5-7 seconds
#show cable tdr interface <interface of your choice>

brocade

#phy cable-diag tdr 1/1/1
Wait 5-7 seconds

#show cable-diag tdr 1/1/1

以下列出 brocade在有接client及未接client顯示出的結果

未接client
Port Speed Local pair Pair Length Remote pair Pair status
---- ----- ---------- ----------- ----------- -----------
0/1/2 UNKWN Pair A 0000081M Open
Pair B 0000084M Open
Pair C 0000084M Open
Pair D 0000080M Open

有接client
Port Speed Local pair Pair Length Remote pair Pair status
---- ----- ---------- ----------- ----------- -----------
0/1/1 100M Pair A N/A M Pair B Terminated
Pair B N/A M Pair A Terminated
Pair C 0000076M Shorted
Pair D 0000072M Shorted

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show tech

show platform tcam utilization

show sdm prefer

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可以改一下sdm template看看，方式為：

(config)#sdm prefer advanced

(config)#reload

Boy_Dorm8F#show sdm prefer

Showing SDM Template Info

This is the Advanced (low scale) template.

Number of VLANs: 4094

Unicast MAC addresses: 32768

Overflow Unicast MAC addresses: 512

IGMP and Multicast groups: 4096

Overflow IGMP and Multicast groups: 512

Directly connected routes: 32768

Indirect routes: 7680

Security Access Control Entries: 1536

QoS Access Control Entries: 3072

Policy Based Routing ACEs: 1024

Netflow ACEs: 1024

Input Microflow policer ACEs: 256

Output Microflow policer ACEs: 256

Flow SPAN ACEs: 256

Tunnels: 256

Control Plane Entries: 512

Input Netflow flows: 8192

Output Netflow flows: 16384

SGT/DGT entries: 4096

SGT/DGT Overflow entries: 512

On next reload, template will be advanced template

These numbers are typical for L2 and IPv4 features.

Some features such as IPv6, use up double the entry size;

so only half as many entries can be created.

Boy_Dorm8F#sh run | in sdm

Boy_Dorm8F#show sdm prefer ad

Boy_Dorm8F#show sdm prefer advanced