I have made many variants of IOS configuration but nothing seem to work yet and finally I need someone to tell me if this is possible at all.
I was using 877W when I was registered to my ISP as a DSL user, everything was perfect. Now I'm using a cable internet and I just can't believe this device can't handle it. I'm trying to get it done for months with one result - network loop (I guess). Don't want to give up.
Situation is as following:
Because 877W doesn't have a routable port, I'm using a VLAN and a Bridge interface to assign an IP address from ISP.
ISP -> FE0 switchport -> VLAN 1 - BVI 1 (BVI with mac address set so ISP will give it IP from their DHCP)
no ip address
no ip redirects
ip address dhcp
ip nat outside
By this configuration, internet works for for a while, then it drops and I have to restart BVI 1 interface to bring internet back again.
If I add this command in main config:
no spanning-tree vlan 1
Internet will never drop but it will became very slow, from say 35Mbps to 1-5mbps.
I think that I need somehow to force my ISP switch to "think" that my FE0 switchport is not a switchport but a single host.
Guys, I need your help!