IPV4 DHCP on router

[scsawyer]

Hello All

I would like to extend the ip address range for the router, but not working like i though it would.

ip dhcp pool Pool
import all
network 192.168.35.0 255.255.254.0
default-router 192.168.35.1
domain-name gleamns
dns-server 8.8.8.8 4.4.4.4
lease 0 2

interface Vlan1
ip address 192.168.35.1 255.255.255.0
ip nat inside
ip nat enable
ip virtual-reassembly in
ip virtual-reassembly out 

which gives me 512 host, but the ones that get the .34 range are not able to connect

[MHM Cisco World]

sure not work the SVI which is GW 255.255.255.0 have mask different than host  255.255.254.0
only match the mask for both GW and host and it will work

[Georg Pauwen]

Hello,

make the changes marked in bold, when you are done, post the full running config again (sh run) so we can doublecheck...

ip dhcp pool center
import all
--> network 192.168.100.0 255.255.255.0
default-router 192.168.100.1
--> no domain-name Domain1
--> dns-server 8.8.8.8
lease 0 2

interface GigabitEthernet4
description outside wan 2
ip address dhcp
--> ip nat outside
duplex auto
speed auto

interface GigabitEthernet5
description outside wan1
ip address dhcp
--> ip nat outside
duplex auto
speed auto

interface Vlan1
--> ip address 192.168.100.1 255.255.255.0
ip nat inside
--> no ip nat enable
no ip virtual-reassembly in
ip virtual-reassembly out

ip forward-protocol nd
ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
ip nat inside source route-map ISP_1_RM interface GigabitEthernet4 overload
ip nat inside source route-map ISP_2_RM interface GigabitEthernet5 overload
ip route 0.0.0.0 0.0.0.0 GigabitEthernet5 dhcp
ip route 0.0.0.0 0.0.0.0 GigabitEthernet4 dhcp
!
route-map ISP_1_RM permit 10
match ip address 101
match interface GigabitEthernet4
!
route-map ISP_2_RM permit 10
match ip address 101
match interface GigabitEthernet5
!
access-list 23 permit any
--> access-list 101 permit ip 192.168.100.0 0.0.0.255 any
access-list 104 permit ip any any
access-list 104 deny ip any any
access-list 110 permit ip any any

[MHM Cisco World]

@Georg Pauwen has answer your perfectly.
if not work then share final config and we will make double check.

[scsawyer]

ok thanks for all the help, I think it is working, I will have to take it out on site to make sure, the only thing i see is that the DHCP with it configured with the 255.255.255.0 it will not give out enough IP Addresses, if i could use the  255.255.254.0 that would give me 512 addresses, but how would you get the rest of it to work with that setting?

[Richard Burts]

I am puzzled by the response from Georg which seems to address an environment different from what is described in the original post. Basically your issue is that there is a mismatch between your pool configuration which is a network /23 and your interface which is /24. It seems to me that if you change the mask on your vlan1 interface to 255.255.254.0 that it should work.

[MHM Cisco World]

can you share you config 

[scsawyer]

ok here is what i have at this time, it will pull IP Addresses but will not browse the internet

hostname Router
!
boot-start-marker
boot-end-marker
!
no aaa new-model
!
ip dhcp pool center
import all
network 192.168.100.0 255.255.254.0
default-router 192.168.100.1
dns-server 8.8.8.8
lease 0 2
!
no ip domain lookup
ip cef
no ipv6 cef
multilink bundle-name authenticated
redundancy

interface GigabitEthernet0
no ip address
!
interface GigabitEthernet1
no ip address
!
interface GigabitEthernet2
no ip address
!
interface GigabitEthernet3
no ip address
!
interface GigabitEthernet4
description outside wan 2
ip address dhcp
ip nat outside
no ip virtual-reassembly in
duplex auto
speed auto
!
interface GigabitEthernet5
description outside wan1
ip address dhcp
ip nat outside
no ip virtual-reassembly in
duplex auto
speed auto
!
interface Vlan1
ip address 192.168.100.1 255.255.254.0
ip nat inside
ip nat enable
no ip virtual-reassembly in
ip virtual-reassembly out
!
ip forward-protocol nd
ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
ip nat inside source route-map ISP_1_RM interface GigabitEthernet4 overload
ip nat inside source route-map ISP_2_RM interface GigabitEthernet5 overload
ip route 0.0.0.0 0.0.0.0 GigabitEthernet5 dhcp
ip route 0.0.0.0 0.0.0.0 GigabitEthernet4 dhcp
!
!
route-map ISP_1_RM permit 10
match ip address 101
match interface GigabitEthernet4
!
route-map ISP_2_RM permit 10
match ip address 101
match interface GigabitEthernet5
!
access-list 23 permit any
access-list 104 permit ip any any
access-list 104 deny ip any any
access-list 110 permit ip any any

[MHM Cisco World · Accepted solution]

access-list 101 is missing ?

[scsawyer]

Thank you, it seems to be working now. I hate access list sometimes.

I appreciate everyone's input.