I have IP Classless in global config (also IP subnet-zero); i am configuring fast0/0 with: ip address 87.192.152.29 255.255.255.192 I get bad mask 0xe1e1e1c0 for address 87.192.152.29; I also tried addresses .30 and .31 with the same result. I thought this network goes from 87.192.152.0 to 63 (according to my subnet calculator).
Any ideas, TIA, Ned