sanjeev
07-26-2003, 02:36 AM
Hi,
I have a query regarding a strange (?) observation I made recently. In the setup below, I'm using Avaya outdoor router Radios :
PC1==Switch==Radio 1---Radio 3---Radio2==PC2
Keys : PC : Personal Computer
Radio : Avaya Radio
=== : UTP Connection
---- : Wireless Connection
Radio 3 is a central outdoor Avaya radio, whilst both radios 1 & 2 are remote outdoors. Though the radios do have a 802.11 setting, I've configured them to use the Avaya non-802.11 compliant MAC layer scheme to talk to each other. From what I understand, they work as wireless bridges. I've verified this by noting the MAC addresses it has learnt on all its interfaces. Note that the Internet is connected via the Ethernet port of Radio 3 (Actually there is a router between this Ethernet port and the
Internet.).
PC2 is browsing the Internet. On PC1, I've got a network sniffer Ethereal) running, and it can see all the TCP Ack messages originating from PC1. These TCP packets are clearly destined for some site on the Internet (via the router), but why do I see them on PC1 ? (These TCP packets have the destination MAC address of the router, and this should be the case.)
To make matters a little more complicated, I've another radio (Radio 4) which is also configured to access the Internet via Radio 3. From PC1, I cannot see any of the TCP packets originating from any computer behind Radio 4. This should be the correct behaviour.
To me it sounds as if Radio 3 has not learnt which devices are behind which interface, but when I examined its 'learnt MAC' table, it has the correct entries.
I have already tried re-starting radio 3, and it hasn't helped.
Can someone offer an explanation ?
Thanks in advance,
Sanjeev
I have a query regarding a strange (?) observation I made recently. In the setup below, I'm using Avaya outdoor router Radios :
PC1==Switch==Radio 1---Radio 3---Radio2==PC2
Keys : PC : Personal Computer
Radio : Avaya Radio
=== : UTP Connection
---- : Wireless Connection
Radio 3 is a central outdoor Avaya radio, whilst both radios 1 & 2 are remote outdoors. Though the radios do have a 802.11 setting, I've configured them to use the Avaya non-802.11 compliant MAC layer scheme to talk to each other. From what I understand, they work as wireless bridges. I've verified this by noting the MAC addresses it has learnt on all its interfaces. Note that the Internet is connected via the Ethernet port of Radio 3 (Actually there is a router between this Ethernet port and the
Internet.).
PC2 is browsing the Internet. On PC1, I've got a network sniffer Ethereal) running, and it can see all the TCP Ack messages originating from PC1. These TCP packets are clearly destined for some site on the Internet (via the router), but why do I see them on PC1 ? (These TCP packets have the destination MAC address of the router, and this should be the case.)
To make matters a little more complicated, I've another radio (Radio 4) which is also configured to access the Internet via Radio 3. From PC1, I cannot see any of the TCP packets originating from any computer behind Radio 4. This should be the correct behaviour.
To me it sounds as if Radio 3 has not learnt which devices are behind which interface, but when I examined its 'learnt MAC' table, it has the correct entries.
I have already tried re-starting radio 3, and it hasn't helped.
Can someone offer an explanation ?
Thanks in advance,
Sanjeev