I have to configure my 870 router for bridged ADSL. I managed to configure it for pure bridging, but I would like to use IRB. This implies that I should improve my knowledge of IOS. I looked at this article:
I tried to follow it, but I'm having some problems. Before I start posting my configuration (actually I tried a few :-)) I have a couple of questions i would like to ask:
1) I don't have an ethernet interface. I could use fastethernet, but that would make my internet connection available only to the single fast ethernet. Is it a good idea to use vlan1? Should I use then a BVI? How should I configure the NAT in that case? Shouldn't the inside be on vlan1 and the outside on atm0?
2) the article says that I have to configure the mac address of bvi1, setting it to the mac address of... bvi1? And all of this while creating it?
atm 0.1 has to be in bridge group 1 (ieee spanning and ip routing), with a dhcp ip address. bvi 1 will also have a dhcp ip address. And then I have vlan 1 with an ip address of 10.10.1.1. vlan 1 is on the nat inside, bvi 1 on the nat outside.
My only problem now is that every time I reboot the router I get a message saying that a random mac address has been chosen for the bvi in bridge group 1 since there is no mac address associated with the selected interface. Not a big deal, but I would still like to fix it. Maybe I'll start a separate thread.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...