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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | [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 startCompiled 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。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | RP/0/RSP0/CPU0:9901-2#packet-trace condition interface tenGigE 0/0/0/30RP/0/RSP0/CPU0:9901-2#packet-trace condition 1 Offset 23 Value 0x01 Mask 0xffRP/0/RSP0/CPU0:9901-2#packet-trace condition 2 Offset 26 Value 0x7b7b7a02 Mask 0xffffffffRP/0/RSP0/CPU0:9901-2#packet-trace condition 3 Offset 30 Value 0x7b7b7a01 Mask 0xffffffffRP/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 HKTType 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 msRP/0/RSP0/CPU0:9901-2#show packet-trace results Wed Aug 26 04:11:14.893 HKTT: D - Drop counter; P - Pass counterLocation | 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
1 2 3 4 5 6 7 8 9 10 11 | // 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).
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