拓扑：2台QFX5100做vc
第一台的配置：
1、set virtual-chassis member 0 mastership-priority 250 #首先将members 0 的优先级调高，默认优先级是128.
2、配置vc口，接vc线的时候尽量接成一个环状，减少故障概率。所以这里使用两条链路
request virtual-chassis vc-port set pic-slot 0 port 46 #将0/0/46口配置成vc口
request virtual-chassis vc-port set pic-slot 0 port 47 #将0/0/47口配置成vc口
第二台：
1、优先级默认就可以了
2、配置vc口
request virtual-chassis vc-port set pic-slot 0 port 46 #将0/0/46口配置成vc口
request virtual-chassis vc-port set pic-slot 0 port 47 #将0/0/47口配置成vc口
root> show virtual-chassis vc-port #查看vc口的状态
fpc0:
--------------------------------------------------------------------------
Interface Type Trunk Status Speed Neighbor
or ID (mbps) ID Interface
PIC / Port
0/46 Configured -1 Up 10000
0/47 Configured -1 Up 10000
#查看vc状态
root> show virtual-chassis
Virtual Chassis ID: d754.985f.52ad
Virtual Chassis Mode: Enabled
Mstr Mixed Route Neighbor List
Member ID Status Serial No Model prio Role Mode Mode ID Interface
0 (FPC 0) Prsnt TA3715170052 qfx5100-48s-6q 250 Master* N VC 1 vcp-255/0/46
1 vcp-255/0/47
1 (FPC 1) Prsnt TA3715170083 qfx5100-48s-6q 128 Backup N VC 0 vcp-255/0/46
0 vcp-255/0/47
