求教cisco2621奇怪的问题？...

我公司共分了8个网段，其统一网关是192.168.0.1，使用一直正常，但是今天突然192.168.1.0这个段上不了网了，后来我无意中把网关改成192.166.0.1就能正常上网，其它网段正常。但是我的网络里根本就没有192.166.0.1这个地址。请问这是怎么回事啊？求教了！

路由器的sh ip arp faste0/0.1

Router#sh ip arp faste0/0.1 Protocol Address Age (min) Hardware Addr Type Interface Internet 192.168.1.43 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.45 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.44 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.33 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.35 0 00ba.0002.8d38 ARPA FastEthernet0/0.1 Internet 192.168.1.37 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.36 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.15 0 000d.8725.6f26 ARPA FastEthernet0/0.1 Internet 192.168.1.14 0 000d.8733.7cef ARPA FastEthernet0/0.1 Internet 192.168.1.1 23 000e.84ac.d580 ARPA FastEthernet0/0.1 Internet 192.168.1.25 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.24 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.26 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.29 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.28 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.31 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.30 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.16 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.22 0 000c.7669.2d97 ARPA FastEthernet0/0.1 Internet 192.168.1.254 - 000e.84a1.1260 ARPA FastEthernet0/0.1

cisco3550交换机的sh ip arp vlan 2

Protocol Address Age (min) Hardware Addr Type Interface Internet 192.168.1.44 8 000d.8713.1fba ARPA Vlan2 Internet 61.191.136.82 72 000e.84a1.1260 ARPA Vlan2 Internet 192.166.0.1 46 000e.84a1.1260 ARPA Vlan2 Internet 192.168.1.1 - 000e.84ac.d580 ARPA Vlan2 Internet 192.168.1.254 23 000e.84a1.1260 ARPA Vlan2

交换机有一个192.166.0.1请教改怎么解决？