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IPv6 Neighbor Solicitation does use 01:AD:DE:AD:DE:AD ?

arulgobi1
Level 1
Level 1

Following is the output from show buffers input-interface gigabitEthernet 2/0/0 packet

after analyzing this packet i found following fields important.

00:1C:F6:22:E9:54  - DST mac address

01:AD:DE:AD:DE:AD - SRC mac address

37 : ICMP

87 : Neighbor Solicitation

       0:                            001CF622

       4: E95401AD DEADDEAD 86DD6E00 00000020 

      20: 3AFFFE80 00000000 00000222 83FFFEF9 

      36: D7C0FF02 00000000 00000000 0001FF83 

      52: 00018700 38600000 00002001 18F80004 

      68: 00000000 00006183 00010101 002283F9 

      84: D7C0FC27 619300                     

1) According to my understanding ND multicast mac address should start something like 33:33: right ?

2) Doesn't cisco show buffer packet command reveal the actual SRC mac address of the sender ?

thanks in advance ,

Gobinath.

2 Replies 2

Harold Ritter
Cisco Employee
Cisco Employee

Hi Gobinath,

You are correct in saying that the destination mac address should be 33:33:. The presence of the value "01ADDEADDEAD" seems to indicate that the buffer has been reinitialized.

Regards

Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
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Thanks Harold , i'm observing same mac-address on the IPv4 packet hence i can safly assume Cisco buffer resetting the SRC mac address.

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