RE: I am having a mental block [7:7609]

[McClendon Susan Contr AEDC/ACS]

> --- "[EMAIL PROTECTED]"  wrote:
> > 
> > host A -----Ethernet-----router SR/TLB---------token
> > ring---host B (MAC
> > address changes. What is the source MAC? What is the
> > destination MAC?)

Bit swapping from canonical Ethernet address to noncanonical Token ring
address should be easy to do by the time you take your written CCIE.
Do each step while learning, then later economize as you wish..

Example MAC 0020.A030.0001

step 1: write it in binary
0000 0000   0010 0000   1010 0000   0011 0000   0000 0000   0000 0001

step 2: write it again in binary but swap bytes 1 with 2, 3 with 4, etc.
0000 0000   0000 0010   0000 1010   0000 0011   0000 0000   0001 0000  

step 3: reverse the bits in each byte
0000 0000   0000 0100   0000 0101   0000 1100   0000 0000   1000 0000

step 4: write it in hex for the answer...
0004.050C.0080

good luck!
susan




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