I am running into a problem with our Cisco 6400s. I have a NNI between a BPX and 6400. It only allows me to use up to 8 bits for VPI. The ATM spec states that 12 bits for VPI over NNI connection. I do the following on the 6400: interface ATM5/1/0 description oc3 to BPX no ip address no atm auto-configuration no atm ilmi-keepalive atm nni LAB1-6400-1-NSP(config)#int a5/1/0 LAB1-6400-1-NSP(config-if)#atm max LAB1-6400-1-NSP(config-if)#atm maxvpi LAB1-6400-1-NSP(config-if)#atm maxvpi-bits ? <0-8> Configure maximum number of VPI bits Has anyone run into this problem? Is there a new version of IOS that will support this? Thanks