Ingress Traffic Engineering and VLSM

[adrianoden]

I am not familier with the Policy's of ARIN as it pertians to the use of VLSM. If an organization is issued an allocation range, lets just say its a small allocation of /24, are you allowed to multihome the advertisement of that /24 out of two locations using different subnet mask? Like a /25 or smaller? 

[John Blakley]

Generally, ISPs will advertise classful blocks. We have a /25 and advertise it, but then our ISP summarizes into a /24. It's possible to advertise your /25, but you may need to speak with the ISP to see if there is anything special that you'll need to do.

HTH,

John