# Mininet p4 2

[TOC]

p4c compiler 官網
https://github.com/p4lang/p4c
有p4c compiler 詳細的說明


https://github.com/p4lang/behavioral-model
target(simple_switch )


Compile p4c(program) and behavioral-model on The Raspberry pi

Attention: Memory 可能不足 (rasberry pi 3 以前)

---


cli_input -> 同等於 cli 下 連接 Switch

simple_switch CLI --Thrift-port 9090 

cmd.txt

table_add mac_forward forward 00:00:0a:00:01:01 => 1
table_add mac_forward forward 00:00:0a:00:01:02 => 2

topology.db (給controller 用的 p4run 完產生)

### 分析 log file

[20:35:11.450] [bmv2] [D] [thread 5204] Adding interface s1-eth1 as port 1
Adding interface s1-eth2 as port 2
[20:35:11.483] [bmv2] [D] [thread 5204] Adding interface s1-eth2 as port 2
[20:35:11.506] [bmv2] [I] [thread 5204] Starting Thrift server on port 9090

s1-eth1 -> port 1
s1-eth2 -> port 2
simple_switch_CLI --thrift-port 9090 (來連接)

h1 ping h2

Receive and Parser

[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Processing packet received on port 1
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Parser 'parser': start
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Parser 'parser' entering state 'start'
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Extracting header 'ethernet'
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Parser state 'start' has no switch, going to default next state
[20:35:20.132] [bmv2] [T] [thread 5210] [4.0] [cxt 0] Bytes parsed: 14
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Parser 'parser': end
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Pipeline 'ingress': start
[20:35:20.132] [bmv2] [T] [thread 5210] [4.0] [cxt 0] Applying table 'MyIngress.mac_forward'
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Looking up key:
* hdr.ethernet.dstAddr: 00000a000102

Ingress

* hdr.ethernet.dstAddr: 00000a000102

[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Table 'MyIngress.mac_forward': hit with handle 1
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Dumping entry 1
Match key:
* hdr.ethernet.dstAddr: EXACT     00000a000102
Action entry: MyIngress.forward - 2,

dstMac Match 第二條Flow (hit with handle 1 )

table_add mac_forward forward 00:00:0a:00:01:02 => 2

Egress

[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Action entry is MyIngress.forward - 2,
[20:35:20.132] [bmv2] [T] [thread 5210] [4.0] [cxt 0] Action MyIngress.forward
[20:35:20.132] [bmv2] [T] [thread 5210] [4.0] [cxt 0] basic.p4(72) Primitive standard_metadata.egress_spec = port
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Pipeline 'ingress': end
[20:35:20.132] [bmv2] [D] [thread 5210] [4.0] [cxt 0] Egress port is 2
[20:35:20.133] [bmv2] [D] [thread 5213] [4.0] [cxt 0] Pipeline 'egress': start
[20:35:20.133] [bmv2] [D] [thread 5213] [4.0] [cxt 0] Pipeline 'egress': end
[20:35:20.133] [bmv2] [D] [thread 5213] [4.0] [cxt 0] Deparser 'deparser': start
[20:35:20.133] [bmv2] [D] [thread 5213] [4.0] [cxt 0] Deparsing header 'ethernet'
[20:35:20.133] [bmv2] [D] [thread 5213] [4.0] [cxt 0] Deparser 'deparser': end
[20:35:20.133] [bmv2] [D] [thread 5215] [4.0] [cxt 0] Transmitting packet of size 98 out of port 2

ping reply (也是差不多的流程)