ip / dhcp question

[billb]

being a bit thick on IP as its a monday can anyone help:

have a dhcp scope of 172.16.1.1 - 254 s/mask of 255.255.0.0.

this is a private made up range

i now need more than the 254 address's on my network should i be simply be able to add another scope - eg 172.16.2.1 - 254 cos it wont let me?

any help appreciated

[zumbruk]

billb said:

being a bit thick on IP as its a monday can anyone help: have a dhcp scope of 172.16.1.1 - 254 s/mask of 255.255.0.0. this is a private made up range i now need more than the 254 address's on my network should i be simply be able to add another scope - eg 172.16.2.1 - 254 cos it wont let me? any help appreciated

Since you're using a /16 subnet range (subnet masks are well old fashioned) then you've allocated addresses from 172.16.1.1 to 172.16.254.254, so I imagine it won't let you allocate another scope because you've already allocated it. And I expect it won't allocate any more addresses from the existing scope because you've fixed the third octet at '1'? Note: I know nada about Microsoft's hideously broken implmentations of most Internet standards.

[pdV6]

billb said:

this is a private made up range

[pedant]
Really ought to use 192.168.x.y then, as that's what its there for...
[/pedant]

[tuffer]

pdV6 said:

billb said: this is a private made up range [pedant] Really ought to use 192.168.x.y then, as that's what its there for... [/pedant]

As is 172.16.0.0 -172.31.255.255 and 10.0.0.0 - 10.255.255.255
Check RFC 1918 RFF 1918

[pdV6]

[tuffer]

pdV6 said:

Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional.

[Podie]

tuffer said:

pdV6 said: Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional.

Out of curiosity, what lease times are you using..?

[agent006]

tuffer said:

Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional.

Nah, we all use allocated addresses.

[tuffer]

Podie said:

tuffer said: pdV6 said: Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional. Out of curiosity, what lease times are you using..?

I'm not, it wasn't my Q!!!

[pdV6]

tuffer said:

pdV6 said: Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional.

Sorry - should've said "" - would've been a bit clearer!

I was fooled by the combination of the phrase "private made up range", the range x.y.1.1 to x.y.1.254 and the subnet mask of 255.255.0.0, which don't seem to hang together properly.

[pdV6]

tuffer said:

thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional.

Meant to add: only as long as you decide that the definition of "IT" is limited to network support. There's plenty of people working directly in the IT industry who know nothing about networking apart from which way up the plug goes in the socket (and even then get it wrong!)

[Podie]

tuffer said:

Podie said: tuffer said: pdV6 said: Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional. Out of curiosity, what lease times are you using..? I'm not, it wasn't my Q!!!

alright, let's not get into a semantic arguement...

[tuffer]

Podie said:

tuffer said: Podie said: tuffer said: pdV6 said: Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional. Out of curiosity, what lease times are you using..? I'm not, it wasn't my Q!!! alright, let's not get into a semantic arguement...

I'm not Jewish.

[agent006]

In answer to the lease question, i bid 8 days (the MS default i think) and 2 hours for the test setup. You didn't ask me though.

[Podie]

tuffer said:

Podie said: tuffer said: Podie said: tuffer said: pdV6 said: Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional. Out of curiosity, what lease times are you using..? I'm not, it wasn't my Q!!! alright, let's not get into a semantic arguement... I'm not Jewish.

that's "semetic" (I think)...

[tuffer]

Podie said:

tuffer said: Podie said: tuffer said: Podie said: tuffer said: pdV6 said: Hardly, thats pretty bread and butter stuff for anyone in IT and considers themselves to be even moderatly proffesional. Out of curiosity, what lease times are you using..? I'm not, it wasn't my Q!!! alright, let's not get into a semantic arguement... I'm not Jewish. that's "semetic" (I think)...

eh!

[loaf]

billb - did you get it sorted?

[Gerrard]

Back to the original q:

rather than adding another scope just increase the range on your present one
172.16.1.1 - 172.16.2.254 (/16)

If this is not enough, as has already been pointed out, (using your present subnet mask) the third octet could be anything from 0 to 255

[billb]

loaf said:

billb - did you get it sorted?

not yet - have just taken over from old IT Manager who's still here and to chicken to change anything without ok from support company will try it when he's gone!

[tuffer]

billb said:

loaf said: billb - did you get it sorted? not yet - have just taken over from old IT Manager who's still here and to chicken to change anything without ok from support company will try it when he's gone!

Do it now and if it goes T1T5 blame it on him