XR Embedded Packet Tracer

喜大普奔,XR终于出了内置的Packet Tracer工具了。该工具作用是用于跟踪数据包进入路由器后经过的组件,监视数据包信息,查找数据包丢失或最后一次见到的位置 .

如我们常用的ACL匹配数据包一样,需要设定特定的匹配条件,然后执行该内置的工具进行数据包的匹配。

Packet Tracer Conditions – Offset/Value/Mask

如何生成这个匹配条件,我们提供了一个web工具,如下,包含丰富的数据包类型:

该Web 工具发布在Github,可以参考以下link完成安装使用:

https://github.com/xr-packet-tracer/xr-embedded-packet-tracer-condition-generator

[root@xuxing ~]# wget -qO- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.3/install.sh | bash
[root@xuxing ~]# nvm install node
[root@xuxing ~]# git clone https://github.com/xr-packet-tracer/xr-embedded-packet-tracer-condition-generator
[root@xuxing ~]# cd xr-embedded-packet-tracer-condition-generator/
[root@xuxing xr-embedded-packet-tracer-condition-generator]# npm install
[root@xuxing xr-embedded-packet-tracer-condition-generator]# npm start

Compiled successfully!

You can now view packet-tracer-condition in the browser.

  Local:            http://localhost:3000/
  On Your Network:  http://10.75.49.238:3000/

Note that the development build is not optimized.
To create a production build, use npm run build.

Packet Trace Use Case

这里使用一个很简单的环境测试下这个feature,用来抓取ICMP数据包进入路由器后的路径。

RP/0/RSP0/CPU0:9901-2#packet-trace condition interface tenGigE 0/0/0/30
RP/0/RSP0/CPU0:9901-2#packet-trace condition 1 Offset 23 Value 0x01 Mask 0xff
RP/0/RSP0/CPU0:9901-2#packet-trace condition 2 Offset 26 Value 0x7b7b7a02 Mask 0xffffffff
RP/0/RSP0/CPU0:9901-2#packet-trace condition 3 Offset 30 Value 0x7b7b7a01 Mask 0xffffffff
RP/0/RSP0/CPU0:9901-2#packet-trace start 
RP/0/RSP0/CPU0:9901-2#ping 123.123.122.2 count  1000                                        
Wed Aug 26 04:11:01.157 HKT
Type escape sequence to abort.
Sending 1000, 100-byte ICMP Echos to 123.123.122.2, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!
Success rate is 100 percent (1000/1000), round-trip min/avg/max = 1/1/12 ms
RP/0/RSP0/CPU0:9901-2#show packet-trace results   
Wed Aug 26 04:11:14.893 HKT
T: D - Drop counter; P - Pass counter
Location     | Source       | Counter                   | T | Last-Attribute                           | Count          
------------   ------------   -------------------------   -   ----------------------------------------   ---------------
0/0/CPU0       NP1            PACKET_MARKED               P   TenGigE0_0_0_30                            1000           
0/0/CPU0       NP1            PACKET_TO_PUNT              P                                              1000           
0/RSP0/CPU0    SPP_PD         PKT_SPP_PD_PUNT_DROP        D                                              1              

Other userful command
// 清除之前的一些设置
#packet-trace atop
#clear packet-trace conditions all 
#clear packet-trace counters all

//show command
#show packet-trace status 
#show packet-trace status detail 
#show packet-trace descriptions  
#show packet-trace results counter PACKET_MARKED location 0/0/CPU0 
#show packet-trace results counter PACKET_MARKED source NP1 location 0/0/CPU0 

限制

7.1.2 开始,5th, 4th and 3rd generation line cards (aka Lightspeed Plus, Lighstpeed, Tomahawk).

Reference

XR Embedded Packet Tracer

           

No comments

Comments feed for this article

Reply

Your email address will not be published. Required fields are marked *