IP Address Space
Some IXPs use private addresses for the IXP LAN
- Public address space means the IXP network can be leaked to the Internet, which could be undesirable
- Filtering RFC1918 address space by ISPs is Best Practice; this avoids leakage
Some IXPs use public addresses for the IXP LAN
- Address space is available from the RIRs
- IXP terms of participation usually forbid carrying the IXP LAN addressing in the ISP backbone