arp 奇怪问题

ash-3.00# arp -a
Net to Media Table: IPv4
Device IP Address Mask Flags Phys Addr
------ -------------------- --------------- ----- ---------------
nge0 61.134.1.21 255.255.255.255 00:1e:4f:13:5c:af
nge0 61.134.1.30 255.255.255.255 00:d0:04:4a:20:0a
nge0 61.134.1.11 255.255.255.255 U
nge0 61.134.1.14 255.255.255.255 00:14:4f:9a:88:32
nge0 xhmdns2 255.255.255.255 SP 00:14:4f:9a:82:b2
nge0 61.134.1.13 255.255.255.255 00:14:4f:9e:35:4c
nge0 224.0.0.0 240.0.0.0 SM 01:00:5e:00:00:00

bash-3.00# arp -a
Net to Media Table: IPv4
Device IP Address Mask Flags Phys Addr
------ -------------------- --------------- ----- ---------------
nge0 61.134.1.21 255.255.255.255 00:1e:4f:13:5c:af
nge0 61.134.1.30 255.255.255.255 00:d0:04:4a:20:0a
nge0 61.134.1.14 255.255.255.255 00:14:4f:9a:88:32
nge0 xhmdns2 255.255.255.255 SP 00:14:4f:9a:82:b2
nge0 61.134.1.13 255.255.255.255 00:14:4f:9e:35:4c
nge0 224.0.0.0 240.0.0.0 SM 01:00:5e:00:00:00

观察 2次 的结果 2次的输出时间 间隔 2秒！ 有地址丢失现象 丢失的是网管地址。

地址丢失同时 会给网关 发送大量的ARP包 都是正常的请求包。

谁能解释 为什么会IP