Just disable the portfast, it wont have enough time to establish any connections then
> Has anyone met the above problem? > > I'm trying a 7200/G2 with 12.2(31)SB13 and i noticed that while reloading > it, the shuted interfaces come up for 2 secs, > which is more than enough time to send packets through them (having > portfast enabled on the switch port). > > I guess the config is parsed sequentially, so if the "shutdown" command > follows the "ip address x.x.x.x" command (which > they do when doing "sh run"), ip connectivity is established first. > > The problem with the above is that if you have to prepare a second router > having identical config with another one > (keeping the interfaces of the second router in the shutdown state), you > end up having duplicate ips for a while (in my > case 2 secs) when reloading the second router. This small time is more > than enough to make the hell out of arp/mac tables!!! > > I know there are many ways to avoid all this mess (remove/change ips, shut > switch ports instead of router ports, etc), > but i was mainly wondering if all this is expected/normal behavior. > > -- > Tassos > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
