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DHCP is not working in Cisco 876 Router

vineethelr
Level 1
Level 1

DHCP is not working in my Cisco 867 router, no systems getting IP address. DHCP configuration is given below,

ip dhcp pool LAN-POOL

network 10.x.x.0 255.255.255.0

default-router 10.x.x.2

domain-name xyz.net

dns-server 10.x.x.x

17 Replies 17

marce1000
VIP
VIP

 

               - Show (full) router config , 

 M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

version 15.5


!


!

!

!

ip dhcp excluded-address 10.x.x.x

ip dhcp excluded-address 10.x.x.x

ip dhcp excluded-address 10.x.x.x

ip dhcp excluded-address 10.x.x.x

ip dhcp excluded-address 10.x.x.x

ip dhcp excluded-address 10.x.x.x

ip dhcp excluded-address 10.x.x.x

!

ip dhcp pool ccp-pool

import all

network 10.x.x.x 255.255.255.248

default-router 10.x.x.x

lease 0 2

!

ip dhcp pool LAN-POOL

network 10.x.x.0 255.255.255.0

default-router 10.x.x.2

domain-name 10.x.x.x

dns-server 10.x.x.0

!

!

!

no ip bootp server

ip domain xxxxxx
ip name-server 8.8.8.8

ip name-server 4.2.2.2


ip cef

login on-failure log

login on-success log

no ipv6 cef


!

!

archive

log config

logging enable

logging size 200

notify syslog contenttype plaintext

hidekeys

object-group service ALLOWED_PORT

tcp eq 587

tcp eq 995

tcp-udp eq 67

udp eq domain

udp eq isakmp

udp eq non500-isakmp

icmp

tcp-udp eq 123

tcp eq 443

tcp eq 21112

!

object-group network SSL_VPN_NETWORK

host x.x.x.x

host x.x.x.x

host x.x.x.x

host x.x.x.x

!

object-group network TRUSTED_NETWORK

10.0.0.0 x.x.x.x

x.x.x.x 255.255.255.0

host x.x.x.x

x.x.x.x 255.255.240.0

x.x.x.x 255.255.252.0

x.x.x.x 255.255.240.0

x.x.x.x 255.248.0.0

host x.x.x.x
host x.x.x.x

!

!

controller VDSL 0

shutdown

no cdp run

!

track 1 list boolean or

object 4

object 5

object 6

object 7

!

track 4 ip sla 1

delay down 3 up 6

!

track 5 ip sla 2

delay down 3 up 6

!

track 6 ip sla 3

delay down 3 up 6

!

track 7 ip sla 4

delay down 3 up 6

!

track 8 ip sla 5

delay down 3 up 6

!

track 12 interface GigabitEthernet0 line-protocol

!

!

class-map match-all HTTP_CLASS

match access-group name HTTPLLIST

class-map match-all IP_CAM_CLASS

description <<Class mapp matching the upload traffic>>

match access-group name IP_CAM_UPLD

class-map match-all MAIL_TRAFFIC

description <<Class mapp matching the MAIL_TRAFFIC traffic>>

match access-group name MAIL_TRAFFIC

class-map match-all VMS_CLASS_2

match access-group name VMS_ACL_2

class-map match-all VMS_CLASS_1

match access-group name VMS_ACL_1

class-map match-all IPCAM_CLASS

match access-group name IPCAM_FILTER

class-map match-all CONTROL_TRAFFIC

description <<Class mapp matching the CONTROL_TRAFFIC traffic>>

match access-group name CONTROL_TRAFFIC

!

policy-map IPCAM_Policy

class IPCAM_CLASS

conform-action transmit

exceed-action drop

policy-map TRAFFIC_CNTRL

class VMS_CLASS_1

shape peak 64000

class VMS_CLASS_2

shape peak 64000

class IP_CAM_CLASS

shape average 64500

class HTTP_CLASS

priority

class CONTROL_TRAFFIC

shape average 16000

class MAIL_TRAFFIC

shape average 64000

class class-default

shape average 64000

!

!

!

!

!

interface ATM0

no ip address

shutdown

no atm ilmi-keepalive

!

interface Ethernet0

description <<Connected to Switch - LAN PORT>>

no ip address

shutdown

!

interface FastEthernet0

no ip address

!

interface FastEthernet1

description <<Connected to Switch - LAN PORT>>

switchport access vlan 3

no ip address

!

interface FastEthernet2

description <<Connected to Switch - LAN PORT>>

switchport access vlan 3

no ip address

!

interface FastEthernet3

description <<Connected to Switch - LAN PORT>>

switchport access vlan 3

no ip address

!

interface GigabitEthernet0

description <<Connected to 3G Combo router>>

switchport access vlan 2

no ip address

!

interface GigabitEthernet1

description <<Connected to Modem on Bridge Mode>>

no ip address

no ip redirects

no ip proxy-arp

duplex auto

speed auto

no cdp enable

pppoe-client dial-pool-number 1

!

interface Vlan1

description $ETH_LAN$

ip address 10.x.x.x 255.x.x.x

ip tcp adjust-mss 1452

!

interface Vlan2

ip address dhcp

no ip redirects

no ip proxy-arp

 

!

interface Vlan3

description <<LAN GATEWAY>>

ip address x.x.x.x 255.x.x.x

ip access-group WSA_PROD in

no ip redirects

no ip proxy-arp

ip nat inside

ip virtual-reassembly in

ip tcp adjust-mss 1100

crypto map cmap

!

interface Dialer1

mtu 1492

ip address negotiated

no ip redirects

no ip proxy-arp

ip nat outside

ip virtual-reassembly in

encapsulation ppp

ip tcp adjust-mss 1452

dialer pool 1

dialer-group 1

no cdp enable

ppp authentication pap chap callin

ppp chap hostname XXXXXXXXXXX

ppp chap password 7 XXXXXXXXXXX

ppp pap sent-username XXXXXXXXXXX password XXXXX

ppp ipcp dns request

crypto map cmap

!

ip forward-protocol nd

no ip http server

ip http access-class 23

ip http authentication local

no ip http secure-server

ip http timeout-policy idle 60 life 86400 requests 10000

!

!

 

ip ssh source-interface Vlan3

ip ssh version 2

!

permit tcp any any eq 443

 

ip radius source-interface Vlan3

ip sla auto discovery

ip sla 1

icmp-echo XXXXXXXXXXX source-interface Dialer1

frequency 6

ip sla schedule 1 life forever start-time now

ip sla 2

icmp-echo XXXXXXXXXXX source-interface Dialer1

frequency 6

ip sla schedule 2 life forever start-time now

ip sla 3

icmp-echo XXXXXXXXXXX source-interface Dialer1

frequency 6

ip sla schedule 3 life forever start-time now

ip sla 4

icmp-echo XXXXXXXXXXX source-interface Dialer1

frequency 6

ip sla schedule 4 life forever start-time now

ip sla 5

icmp-echo XXXXXXXXXXX source-interface Vlan2

frequency 5

ip sla schedule 5 life forever start-time now

ip sla 6

icmp-echo XXXXXXXXXXX source-interface Vlan3

frequency 5

ip sla schedule 6 life forever start-time now

ip sla 7

icmp-echo XXXXXXXXXXX source-interface Vlan3

frequency 20

ip sla schedule 7 life forever start-time now

ip sla 8

icmp-echo XXXXXXXXXXX source-interface Vlan3

frequency 180

ip sla schedule 8 life forever start-time now

ip sla 9

icmp-echo XXXXXXXXXXX source-interface Vlan3

frequency 180

ip sla schedule 9 life forever start-time now

ip sla 10

icmp-echo XXXXXXXXXXX source-interface Vlan3

frequency 5

ip sla schedule 10 life forever start-time now

ip sla 11

icmp-echo XXXXXXXXXXX source-interface Vlan3

frequency 5

ip sla schedule 11 life forever start-time now

logging history informational

logging facility syslog

logging source-interface Vlan3

mac-address-table aging-time 10

!

route-map EzVPN1 permit 1

match ip address 103

match interface Dialer1

!

route-map EzVPN_sec permit 1

match ip address 103

match interface Vlan2

!

snmp-server group V3User v3 auth

snmp-server group V3Group v3 auth read V3Read

snmp-server group V3Group v3 priv read V3Read

snmp-server group WHTSAPP v3 auth

snmp-server group WHTSAPGroup v3 auth read WHTSAPRead

snmp-server group WHTSAPGroup v3 priv read WHTSAPRead

snmp-server view V3Read iso included

snmp-server view V3Read mib-2 included

snmp-server view WHTSAPRead iso included

snmp-server view WHTSAPRead mib-2 included

snmp-server trap-source Vlan3

snmp-server system-shutdown

snmp-server enable traps snmp authentication linkdown linkup coldstart warmstart

snmp-server enable traps config

snmp-server enable traps entity

snmp-server host x.x.x.x version 3 priv V3User

snmp-server host x.x.x.x version 3 priv V3User

snmp-server host x.x.x.x version 3 auth WHTSAPP

access-list 20 remark ***//SNMP_ACL//***

access-list 20 permit x.x.x.x

access-list 20 permit x.x.x.x

access-list 20 deny any log

access-list 23 permit x.x.x.x log

access-list 23 permit x.x.x.x log

access-list 23 permit x.x.x.x log

access-list 23 permit x.x.x.x log

access-list 23 permit x.x.x.x log

access-list 23 permit x.x.x.x log

access-list 23 permit x.x.x.x log

access-list 23 permit x.x.x.x log

access-list 23 permit x.x.x.x 0.0.0.255 log

access-list 23 deny any log

access-list 103 deny ip x.x.x.x 0.0.0.255 x.x.x.x 0.0.0.255

access-list 103 deny ip any host x.x.x.x

access-list 103 deny ip x.x.x.x 0.0.0.255 x.x.x.x 0.0.0.255

access-list 103 deny ip any x.x.x.x 0.255.255.255

!

!

radius server RAS

address ipv4 x.x.x.x auth-port 1812 acct-port XX

!

!

 

!

line con 0

exec-timeout 5 0

no modem enable

line aux 0

no exec

line vty 0 4

access-class 23 in

exec-timeout 5 0

privilege level 15

transport input ssh

transport output telnet

!

scheduler allocate 60000 1000

ntp authentication-key xxxx

ntp authenticate

ntp server x.x.x.x source Vlan3

time-range ipcam_limit

periodic daily 8:00 to 20:30

!

!

end

 

Hello,

post the full running configuration (show run) with 'x' - ing out all IP addresses. It is impossible to figure out what you have configured without seeing the actual IP addresses. These are all private space IP addresses anyway.

Hello,

does your LAN interface have IP address 10.x.x.2 255.255.255.0 ?

Also, make sure your DHCP service is enabled:

867#conf t

867(config)#service dhcp

Hi,

DHCP service is enabled, Also IP is showing when we checking "sh ip dhcp binding", but not pinging to the IPs also communication is not happening

but not pinging to the IPs also communication is not happening

need more information here - from what IP not pining from where (that means what is source IP and what is destination IP ?)

If you looking  to setup Multiple Lan, all VLAN should also configure inside nat to go internet.

 

BB

***** Rate All Helpful Responses *****

How to Ask The Cisco Community for Help

issue with DHCP or with connectivity ?

If we put manual IP in system, it will work. Otherwise not working. Suspecting issue with DHCP.

interface Vlan1

description $ETH_LAN$

ip address 10.x.x.x 255.x.x.x <<- MUST MATCH

ip tcp adjust-mss 1452

!

ip dhcp pool LAN-POOL

network 10.x.x.0 255.255.255.0 <<- MUST MATCH

default-router 10.x.x.2

domain-name 10.x.x.x

dns-server 10.x.x.0

 

Hi,

We have tagged Vlan3 in interface FE2, please find the configuration,

ip dhcp pool LAN-POOL

network 10.x.x.0 255.255.255.0

default-router 10.x.x.2

domain-name xxxxxx

dns-server 10.x.x.0


interface Vlan3

description <<LAN GATEWAY>>

ip address 10.x.x.2 255.255.255.0

ip access-group WSA_PROD in

no ip redirects

no ip proxy-arp

ip nat inside

ip virtual-reassembly in

ip tcp adjust-mss 1100

crypto map cmap

interface FastEthernet2

description <<Connected to Switch - LAN PORT>>

switchport access vlan 3

no ip address

 

Hello,

why is there a crypto map applied to a LAN (VLAN3) interface ? I would suggest that you post a detailed drawing of your entire network, as there seem to be a lot of 'unknowns' in your topology, one or several of which are causing your problem(s).

Branch Network.jpg

ip access-WSA_PROD in <<- can I see this ACL ?

ip access-list extended WSA_PROD

permit udp any eq bootpc any eq bootps

permit object-group ALLOWED_PORT 10.x.x.0 0.0.0.255 any log

permit ip 10.x.x.0 0.0.0.255 object-group TRUSTED_NETWORK log

permit ip 10.x.x.0 0.0.0.255 10.x.x.0 0.0.0.255

permit tcp host 10.x.x.1 host 10.x.x.2 eq 22

permit tcp 10.x.x.0 0.0.0.255 object-group SSL_VPN_NETWORK eq 443

permit udp 10.x.x.0 0.0.0.255 host 4.2.2.2 eq domain

permit udp 10.x.x.0 0.0.0.255 host 8.8.8.8 eq domain

deny ip any any

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