From: Joel W. Ekis (jekis@xxxxxxxxx)
Date: Wed Jan 26 2000 - 21:40:48 GMT-3
The IANA owns a block of Ethernet addresses that in hexadecimal is 00:00:5e. Th
is is the high-order 24 bits of the Ethernet address, meaning that this block i
ncludes addresses in the range 00:00:5e:00:00:00 to 00:00:5e:ff:ff:ff. The IANA
allocates half of this block for multicast addresses. Given that the first byt
e of any Ethernet address must be 01 to specify a multicast address, the Ethern
et addresses corresponding to IP multicasting are in the range 01:00:5e:00:00:0
0 through 01:00:5e:7f:ff:ff.
Since you choose the MAC to be AB:... you set the Mutlicast bit! (Remember tha
t 0xB = 1011 in binary) You just told the router that the server is using a mu
lticast MAC. On T/R!!!
Change your example to use the customary IPX server MAC of 0000.0000.0001 and a
ll will be fine.
Joel
At 04:18 PM 1/26/2000 -0800, Alex Yeung wrote:
>Hi All,
>
>If I have an IPX server on a token ring network with address ABCD.1234.5678,
>how do I set a static sap and a static route to this server?
>
>I've tried the following command, but it didn't work:
>ipx sap 4 FILE 20.ABCD.1234.5678 452 1
>the router will give me an error saying:
>%Illegal IPX address - multicast not permitted
>
>Any ideas?
>
>Alex Yeung, CCNP, MCSE
>Network Engineer
>
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:22:46 GMT-3