Okay, I've found the cause of the issue.
A few points:
- I am using GNS3
- SGBP Generates the Reference Number using the last 8 digits of a BIA MAC Address
- If both Routers have the same SGBP Reference Number, it won't work
- Changing the Interface MAC Address will not work, because it is not the Burned In Address (BIA) MAC Address
In my case, my GNS3 Routers gave me the following BIA MAC Address:
R1 (bia cc00.b22c.0010) - Ref Number Generated: 0xB22C0010
R2 (bia cc01.b22c.0010) - Ref Number Generated: 0xB22C0010
Both R1 & R2 got the same Ref Number, and therefore the error appeared.
Solution 1:
Use a Router model where all modules are removable.
Since Serial Interfaces do not have BIA MAC Addresses, use Serial Interface Modules ONLY.
When the group is created, the following happens:
R1(config)#sgbp group SGBP
ref is 4400000
SGBP Doesn't find a bia to use as reference, self generate one
The self generated one will be random, and it will be usable.
Solution 2:
Use a Router model where all modules are removable.
R1, place FE Module in slot 0 only
R2, place FE Module in slot 1 only
R1 Fa0/0 (bia cc00.e3f8.0000) - Ref Number Generated: 0xE3F80000
R2 Fa1/0 (bia cc01.e3f8.0010) - Ref Number Generated: 0xE3F80010
Solution 3:
Use 2 different model of Routers to run the SGBP.
This will give different BIA MAC Address for the last 8 digits.
