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为了深入学习数据中心的架构，准备学习 EVPN，学习 BGP，入手 quagga。
下载 quagga 源码
admin@ubuntu:~$ wget http://mirror.ossplanet.net/nongnu/quagga/quagga-1.2.4.tar.gz配置
./configure (默认的安装路径是 /usr/local/)
配置过程出现的问题：error: GNU awk is required for lib/memtype.h made by memtypes.awk.
BSD awk complains: awk: gensub doesn't support backreferences (subst"\1")
解决：sudo apt-get insatll gawk
配置过程出现的问题：configure: error: Package requirements (libcares) were not met:
No package 'libcares' found
Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.
Alternatively, you may set the environment variables CARES_CFLAGS
and CARES_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.
解决方法：下载并安装 c -ares-1.12.0.tar.gz
admin@ubuntu:~$ wget https://c-ares.haxx.se/download/c-ares-1.14.0.tar.gz
admin@ubuntu:~$ ls
admin@ubuntu:~$ tar -xzvf c-ares-1.14.0.tar.gz
admin@ubuntu:~$ l
admin@ubuntu:~$ cd c-ares-1.14.0/
admin@ubuntu:~$ ./configure
admin@ubuntu:~$ make
admin@ubuntu:~$ sudo make install启动
sudo zebra -d // 启动
出现错误：zebra: error while loading shared libraries: libzebra.so.1: cannot open shared object file: No such file or directory
解决办法：sudo cp /usr/local/lib/libzebra.so.1 /lib
然后重新执行 sudo zebra -d
开启 zebra 服务：zebra - d 就会出现 privs_init: could not lookup user quagga
增加用户组 quagga 和用户 quagga
admin@ubuntu:~$ sudo groupadd quagga
admin@ubuntu:~$ sudo useradd quagga -g quagga
admin@ubuntu:~$ sudo chown quagga:quagga /var/run/
admin@ubuntu:~$ chown quagga:quagga /usr/local/etc/
admin@ubuntu:~$ sudo chown quagga:quagga /usr/local/etc/
admin@ubuntu:~$ chmod 777 /var/run/
admin@ubuntu:~$ chmod 777 /usr/local/etc/
admin@ubuntu:~$ sudo cp /usr/local/etc/zebra.conf.sample /usr/local/etc/zebra.conf
admin@ubuntu:~$ sudo zebra -d
admin@ubuntu:~$ sudo cp /usr/local/etc/bgpd.conf.sample /usr/local/etc/bgpd.conf
admin@ubuntu:~$ sudo bgpd -d
admin@ubuntu:~$ sudo cp /usr/local/etc/vtysh.conf.sample /usr/local/etc/vtysh.conf
admin@ubuntu:~$ sudo vtysh 正文完