Cisco IOS XE, Configuration Manual

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Configuring ISG Access for IP Subscriber Sessions
Configuration Examples for ISG Access for IP Subscriber Sessions
37
DHCP Server Coresident with ISG Configuration
In the following configuration example, the ISPs are ISP1 and ISP2 companies. The ISP1 company has
its addresses assigned from an address pool that is dynamically allocated using on-demand address pools
(ODAP). The ISP2 company has its customer addresses assigned from the address pool 10.100.0.0/16.
Customers not associated with any ISP will have an address allocated from the address pool 10.1.0.0/16,
and the lease time is set to 10 minutes.
!Address pool for ISP1 customers
ip dhcp pool isp1-pool
origin dhcp
class isp1
!
!Address pool for ISP2 customers
!
ip dhcp pool isp2-pool
network 10.100.0.0 255.255.0.0
class isp2
!
!Address pool for customers without an ISP
!
ip dhcp pool temp
network 10.1.0.0 255.255.0.0
lease 0 0 10
class default
DHCP Relay Agent Coresident with ISG Configuration
In the following configuration example, there are two ISPs, “poolA” and “poolB”. The “poolA” ISP and
its customers are allowed to have addresses in the ranges 10.1.0.0/16 and 10.3.0.0/16, and are relayed to
the DHCP server at 10.55.10.1. The “poolB” ISP and its customers are allowed to have addresses in the
range 10.2.0.0/16 and 10.4.0.0/16, and are relayed to the DHCP server at 10.10.2.1.
!Address ranges:
interface gigabitethernet1/0/0
ip address 10.1.0.0 255.255.0.0
ip address 10.2.0.0 255.255.0.0 secondary
interface gigabitethernet2/0/0
ip address 10.3.0.0 255.255.0.0
ip address 10.4.0.0 255.255.0.0
!Address pools for poolA1 and poolB2:
ip dhcp pool poolA1
relay source 10.1.0.0 255.255.0.0
class poolA1
relay target 10.55.10.1
!Address pool for poolA2:
ip dhcp pool poolA2
relay source 10.3.0.0 255.255.0.0
class poolA2
relay target 10.55.10.1
!Address pools for poolB1 and poolB2:
ip dhcp pool poolB1
relay source 10.2.0.0 255.255.0.0
class poolB1
relay target 10.10.2.1