Tungsten Fabric(3):与vMX建立基本的iBGP
2020-04-02 本文已影响0人
ljyfree
前期准备
- ESXi主机上创建虚拟机安装EVE-NG
- EVE-NG上的虚机和连线描述如下：
- mgmt-net可以让虚机之间互通，并可以访问外网
- 创建多台CentOS7.7的虚机，基于TF&k8s集成部署(deployer/master/node)
- master(contrail)的eth0的IP为192.168.122.177/24
- 创建vMX虚拟交换机(vmx14.1)，ge-0/0/2的IP为192.168.122.102/24
- 从master可以ssh登录虚拟交换机
- 到deployer上查看ansible部署contrail的配置文档，查看BGP AS号(64512)
[root@deployer contrail-ansible-deployer]# cat contrail_configuration.md | grep BGP
BGP_PORT=${BGP_PORT:-179}
BGP_AUTO_MESH=${BGP_AUTO_MESH:-'true'}
BGP_ASN=${BGP_ASN:-64512}
[root@deployer contrail-ansible-deployer]#
- 确认master的BGP端口在监听
[root@master01 ~]# ss -apn | grep 179 | grep tcp
tcp LISTEN 0 128 192.168.122.177:179 *:* users:(("contrail-contro",pid=3192,fd=33))
[root@master01 ~]#
- 为了简化配置，BGP就不设置认证了
验证过程
vMX初始配置
- 因为要通过vMX的环回端口lo0和TF建立iBGP邻居，所以基础配置如下
set interfaces ge-0/0/2 unit 0 family inet address 192.168.122.102/24
set interfaces lo0 unit 0 family inet address 1.1.1.1/32
set routing-options router-id 1.1.1.1
set routing-options autonomous-system 64512
set protocols bgp group tf-peer type internal
set protocols bgp group tf-peer local-address 1.1.1.1
set protocols bgp group tf-peer neighbor 192.168.122.177
master添加路由
- 为了从master可以到达1.1.1.1，需要添加一条静态路由
[root@master01 ~]# ip route add 1.1.1.1/32 via 192.168.122.102
[root@master01 ~]# ping 1.1.1.1
PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_seq=1 ttl=64 time=2.63 ms
^C
--- 1.1.1.1 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 2.637/2.637/2.637/0.000 ms
[root@master01 ~]#
TF添加BGP Router
- 起始TF&k8s部署完毕后，默认就会将TF本身添加为BGP Router
- 下面需要手动将vMX添加为新的BGP router
-
同页面上，指定master作为peer
-
在TF的WebUI上，可以看到master下新出现了新添加的vMX的信息
-
如果需要对新加的BGP Router表项进行修改，为了防止没有更新成功，建议采用“先删后加”的方式，更加稳妥
vMX的BGP配置
- 此时BGP邻居并未建立
netops@vMX-1> show bgp neighbor
Peer: 192.168.122.177 AS 64512 Local: 1.1.1.1 AS 64512
Type: Internal State: Active Flags: <>
Last State: Idle Last Event: Start
Last Error: Open Message Error
Options: <Preference LocalAddress AddressFamily Rib-group Refresh>
Address families configured: inet-vpn-unicast route-target inet-mvpn evpn
Local Address: 1.1.1.1 Holdtime: 90 Preference: 170
Number of flaps: 3
Last flap event: RecvNotify
Error: 'Open Message Error' Sent: 1 Recv: 0
Error: 'Cease' Sent: 0 Recv: 12
netops@vMX-1>
-
抓取BGP的协议报文，发现是因为BGP notification报文中携带的capability不匹配导致无法建立
-
需要将vMX相关的address-family激活，新加配置
set protocols bgp group tf-peer family inet-vpn unicast
set protocols bgp group tf-peer family evpn signaling
set protocols bgp group tf-peer family inet-mvpn signaling
set protocols bgp group tf-peer family route-target
查看结果
- 在vMX上,BGP邻居状态已经是Established，验证成功
netops@vMX-1> show bgp neighbor
Peer: 192.168.122.177+32878 AS 64512 Local: 1.1.1.1+179 AS 64512
Type: Internal State: Established Flags: <Sync>
Last State: OpenConfirm Last Event: RecvKeepAlive
Last Error: Open Message Error
Options: <Preference LocalAddress AddressFamily Rib-group Refresh>
Address families configured: inet-vpn-unicast route-target inet-mvpn evpn
Local Address: 1.1.1.1 Holdtime: 90 Preference: 170
Number of flaps: 2
Last flap event: RecvNotify
Error: 'Open Message Error' Sent: 1 Recv: 0
Error: 'Cease' Sent: 0 Recv: 10
Peer ID: 192.168.122.177 Local ID: 1.1.1.1 Active Holdtime: 90
Keepalive Interval: 30 Group index: 0 Peer index: 0
BFD: disabled, down
NLRI for restart configured on peer: inet-vpn-unicast route-target inet-mvpn evpn
NLRI advertised by peer: inet-vpn-unicast inet6-vpn-unicast route-target evpn
NLRI for this session: inet-vpn-unicast route-target evpn
Peer does not support Refresh capability
Stale routes from peer are kept for: 300
Peer does not support Restarter functionality
NLRI that restart is negotiated for: inet-vpn-unicast route-target evpn
NLRI of received end-of-rib markers: inet-vpn-unicast route-target evpn
NLRI of all end-of-rib markers sent: inet-vpn-unicast route-target evpn
Peer does not support 4 byte AS extension
Peer does not support Addpath
Table bgp.rtarget.0 Bit: 20000
RIB State: BGP restart is complete
RIB State: VPN restart is complete
Send state: in sync
Active prefixes: 0
Received prefixes: 7
Accepted prefixes: 7
Suppressed due to damping: 0
Advertised prefixes: 0
Table bgp.evpn.0
RIB State: BGP restart is complete
RIB State: VPN restart is complete
Send state: not advertising
Active prefixes: 0
Received prefixes: 0
Accepted prefixes: 0
Suppressed due to damping: 0
Table bgp.l3vpn.0
RIB State: BGP restart is complete
RIB State: VPN restart is complete
Send state: not advertising
Active prefixes: 0
Received prefixes: 0
Accepted prefixes: 0
Suppressed due to damping: 0
Last traffic (seconds): Received 22 Sent 23 Checked 23
Input messages: Total 5 Updates 4 Refreshes 0 Octets 290
Output messages: Total 3 Updates 0 Refreshes 0 Octets 211
Output Queue[1]: 0
Output Queue[2]: 0
Output Queue[3]: 0
netops@vMX-1>
