search for: trunkport

Thank you everyone. OK, the mystery deepens, I guess. The machine does need to support several VLAN's, it is currently on a trunkport (8021q encapsulated), it made it into the ARP table - which I specifically tested for by physically unplugging the table, clearing the ARP table and plugging it back in. The ARP table currently looks like this: hq#show arp Protocol Address Age (min) Hardware Addr Type Interface Int...

...ing state and not pruned Gi1/0/3 1-3,7,48-50 hq> Boris. On Sun, Jan 25, 2015 at 7:05 PM, Boris Epstein <borepstein at gmail.com> wrote: > Thank you everyone. > > OK, the mystery deepens, I guess. The machine does need to support several > VLAN's, it is currently on a trunkport (8021q encapsulated), it made it > into the ARP table - which I specifically tested for by physically > unplugging the table, clearing the ARP table and plugging it back in. > > The ARP table currently looks like this: > > hq#show arp > Protocol Address Age (min) Har...

I upgraded one of my old machines running 5.x to the latest kernel (from 308.24.1 to 348.1.1). After rebooting network connectivity was gone. I rebooted with the old kernel, I also tried the one before it (308.20.1) still no luck. So I assume it's got nothing to do with the kernel or even CentOS. But a hardware failure seems also unlikely, see below. ethtool shows the link as up and if I

On 25 January 2015 at 15:12, Boris Epstein <borepstein at gmail.com> wrote: > OK... but why does it need to be a trunk port? > Because a trunk port will "trunk" the vlan. A VLAN is basically a 4 byte "tag" that gets injected into the packet header when the packet enters the VLAN network. When we trunk a VLAN we say to the switch "pass packets on VLAN x but

...> hq> > > Boris. > > On Sun, Jan 25, 2015 at 7:05 PM, Boris Epstein <borepstein at gmail.com> > wrote: > >> Thank you everyone. >> >> OK, the mystery deepens, I guess. The machine does need to support >> several VLAN's, it is currently on a trunkport (8021q encapsulated), it >> made it into the ARP table - which I specifically tested for by physically >> unplugging the table, clearing the ARP table and plugging it back in. >> >> The ARP table currently looks like this: >> >> hq#show arp >> Protocol Add...