Hello!
I have two wan connections. Vdsl on ether 1 (pppoe) and hfc docsis modem in bridge mode on ether 2 ( dhcp client).
My question is if this is normal behaviour.
When i open some web page (after dhcp client on ether 2 is enabled)…arp list is populated with enormus number of mac addreses.
If pppoe is enabled on ether 1…arp table remains only with mac addresses of my lan equipment…
If this is not how it is supposed to be how to stop dhcp client to populate arp table…
Thx
Bump.
Anyone?
I can explain in more details if necessary…
Thx
It is normal that ARP list contains MAC addresses of all directly accessible hosts. If your ether2 is part of decently-sized L2 subnet (use of DHCP to obtain IP address on that interface implies this possibility), it’ll end up containing MAC addresses of all other routers present on the same DOCSIS branch.
This doesn’t happen on PPPoE connected interface as PPPoE is a point-to-point protocol running unicast on top of ethernet and probably adds only one or two MAC addresses to ARP list (one belongs to BRAS which hosts PPPoE server) while xDSL is point-to-point technology as well and normally DSLAM (which terminates xDSL line on telco side) takes care of customer separation.