bad mask on 2600 router for secondary IP address

[bentelys50]

I am trying to add a secondary IP address on the ethernet interface of a 2600 route, IP subnet-zero is configured.

the error is as follows

ajs_internet_gw#

ajs_internet_gw#config t

Enter configuration commands, one per line. End with CNTL/Z.

ajs_internet_gw(config)#interface Ethernet0/0

ajs_internet_gw(config-if)#ip address 65.37.108.72 255.255.255.248 secondary

Bad mask /29 for address 65.37.108.72

ajs_internet_gw(config-if)#exit

this subnet was given to me by my ISP, as I need a bigger block of address ... I need to set up a secondary range while I configure a replacement Firewall....

[prafuljaded]

65.37.108.72/29 is the subnet ip. try configuring 65.37.108.73/29

[bentelys50]

Is that not what I have done

"ip address 65.37.108.72 255.255.255.248 secondary"

is the syntax wrong?

[bentelys50]

Misread your response.. thanks for the info..