Wireless Internet forum: Router Broadcast Storm

Hi Hms91,

Dont worry.. What ever they done is fine.. Here is why its happening

Internetwork-level broadcasts are Media Access Control (MAC)-level
broadcast frames with a special destination internetwork address that
informs the router that the packet is to be forwarded to all other
networks except the network on which it was received. Routers must be
configured to pass internetwork-level broadcast traffic. A MAC-level
broadcast frame is used to reach all the hosts on a network. Routers,
unlike bridges, do not forward MAC-level broadcast traffic. However, to
reach all the hosts on an internetwork, some routable protocols support
the use of internetwork-level broadcasts.
The inherent danger of forwarding internetwork-level
broadcasts is the possibility of an internetwork-level broadcast storm
in which a host malfunctions and continuously sends out the same
internetwork-level broadcast packet. If the routers forward this
traffic, the result is that all the hosts on the internetwork process
each broadcast frame, possibly crippling the entire internetwork.
The NetBIOS over IPX broadcast is an internetwork-level
broadcast. NetBIOS applications on an IPX internetwork use a NetBIOS
over IPX broadcast to perform name registration, resolution, and
release. When the NetBIOS over IPX broadcast packet is received by an
IPX router, the router records the network on which the packet was
received in the NetBIOS over IPX header. Thus, the internetwork path is
recorded in the NetBIOS over IPX header as it traverses the IPX
internetwork.
Before being forwarded, the IPX router checks the
internetwork path information to prevent the forwarding of the NetBIOS
over IPX broadcast onto a network on which it has already traveled. This
prevents the broadcast from looping and causing more broadcast traffic.
As an additional safeguard, NetBIOS over IPX broadcast packets can only
propagate across eight networks using seven routers. At the eighth
router, the packet is discarded without notifying the sending host. This
is known as a silent discard. For more information about NetBIOS over
IPX broadcasts.