On Tue, Apr 20, 2010 at 08:35:48AM +0200, Arne Larsen / Region Nordjylland wrote: > Hi all. > > Can someone give me an answer on this. > We have a platform that run on Redhat EntR5.3 and uses subinterfaces. > I seem that the platform sends the same MAC for all interfaces. > What happens in the arp table on the default gateway. Does it keep track of > all ip address or does it overwrite it. /Arne
When you say subinterfaces -- do you mean vLAN/dot11q interfaces configured with vconfig, or secondary addresses configured as aliases? In either case, it isn't a major issue. If it's vLANs, most switches maintain a different layer 2 forwarding database for each vLAN, so the same MAC in multiple vLANs is handled appropriately. If it's aliases, it still isn't an issue, as the layer 3 device will gladly store the same MAC address in the ARP table for multiple IPs. -- Brandon Ewing ([email protected])
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