主机上2块网卡做etherchannel，配置成主备模式。因为条件有限两块网卡接在一个交换机上。现在做测试时把主网卡上的网线拔掉发现并没有切换到备网卡。etherchannel配置没有问题，是否etherchannel配成主备的话两块网卡一定要分别接到不同的两台交换机上。请各位大侠指点一二。谢谢！
下面是列出来的配置列表：
COMMAND STATUS
Command: OK stdout: yes stderr: no
Before command completion, additional instructions may appear below.
EtherChannel / Link Aggregation: ent4
Status: Available
Attributes:
adapter_names ent0 EtherChannel Adapters
alt_addr 0x000000000000 Alternate EtherChannel Address
auto_recovery yes Enable automatic recovery after failover
backup_adapter ent3 Adapter used when whole channel fails
hash_mode default Determines how outgoing adapter is chosen
mode standard EtherChannel mode of operation
netaddr 0 Address to ping
noloss_failover yes Enable lossless failover after ping failure
num_retries 3 Times to retry ping before failing
retry_time 1 Wait time (in seconds) between pings
use_alt_addr no Enable Alternate EtherChannel Address
use_jumbo_frame no Enable Gigabit Ethernet Jumbo Frames
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