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Weird mac address on local network

Discussion in 'General Discussion' started by Toril, Oct 21, 2004.

  1. Toril

    Toril Network Guru Member

    Quick oddball Linksys question... to make a long story short, I work for an ISP and we have a DSL customer causing storms on a bridged network... I worked with her yesterday over the phone, (she has a linksys router) and the local mac address is FE:FF:FF:00:00:00 ... anyone ever see this? Is the router defective? On the WAN side, I had it clone her mac address of her PC ... on the LAN side, there's no capability of changing the mac address... my WRT54G at home's mac address (on the LAN side) begins with 00:FF:66 and according to this mac addy to manufacturer cross reference the mac is valid, ("00:0F:66 is assigned to Cisco-Linksys")... I should also mention hers is a non-wireless, regular cable/dsl router. But still the mac address looks weird. Any thoughts?
  2. Esquire

    Esquire Mesquire Staff Member Member

    Just being curious here. To which "local MAC address" are you referring? On a WRT54G, there are 3 MAC addresses listed under Status in the firmware - one for the router (presumably WAN), one for WLAN, and one for LAN, not to mention there is another on my network adapter.

    Do your customers use PPPoE to connect? Is the router's PPPoE dialler working?

    Is there any reason why your customer is using a bridged network? The MAC address you mentioned may have been caused by the bridge. What operating system is the computer using? Does it have 2 network adapters on board?

    What actual problem is this customer experiencing?
  3. Toril

    Toril Network Guru Member

    Yes, it's on the LAN... the bridged network is our fault^H^H^H^H^H doing, and the weird mac was causing broadcast storms on our bridged network. Actually we're moving to PPPoe, which I did mostly yesterday (and the problems have since stopped.)

    Also, I must say, the router is a BEFSR411, and there is a problem with wierd broadcasts in the 1.04 firmware (confirmed off Linksys's website). I tried to upgrade to 1.05 and boinked the router (poor customer). Luckily, I wrote to Linksys previously, and they said yes, this is a defective router, bring it back to the store or RMA it... I passed this info along to the customer... will probably pick up on it on Monday. Linksys even recommended not attempting to upgrade it... hehe. It's all good now... the customer is on the internet this weekend (we shipped out a 4 port DSL modem capable of doing NAT for their 2 computers) and we'll handle the RMA/return of the router next week.

    How many ISPs do that? ;)
  4. Esquire

    Esquire Mesquire Staff Member Member

    You are the first I've heard of :D

    My ISP blames the router as soon as they hear the customer is using one and refuses to go any further with tech support, even though it is a line/connection fault.

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