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Add docs about flow spec configuration on Git's ExaBGP
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docs/BGP_FLOW_SPEC.md
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47
docs/BGP_FLOW_SPEC.md
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### All this docs about ExaBGP 4.0 (Git master branch)
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Thay are not compatible with ExaBGP 3.0
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vim /root/announcer.py:
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```bash
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#!/usr/bin/python
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fl=open("/var/run/exabgp.cmd", "w")
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fl.write("announce flow route source 4.0.0.0/24 destination 127.0.0.0/24 protocol [ udp ] source-port [ =53 ] destination-port [ =80 ] packet-length [ =777 =1122 ] fragment [ is-fragment dont-fragment ] rate-limit 1024" + '\n')
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fl.flush()
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fl.close
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```
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Please be careful about flush and trailing '\n'!!!
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vim /etc/exabgp_flowspec.conf:
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```bash
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process announce-routes {
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run /usr/bin/socat stdout pipe:/var/run/exabgp.cmd;
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encoder json;
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}
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neighbor 127.0.0.1 {
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router-id 1.2.3.4;
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local-address 127.0.0.1;
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local-as 1;
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peer-as 1;
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group-updates false;
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family {
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ipv4 flow;
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}
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api {
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processes [ anounce-routes ];
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}
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}
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```
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Run it:
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```bash
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env exabgp.api.file=/tmp/exabgp.cmd exabgp.daemon.user=root exabgp.daemon.daemonize=false exabgp.daemon.pid=/var/run/exabgp.pid exabgp.log.destination=/var/log/exabgp.log sbin/exabgp --debug /etc/exabgp_flowspec.conf
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```
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