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Cisco Router 800 Series Software Configuration Guide

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Cisco 800 Series Software Configuration Guide
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Chapter 7      Router Feature Configuration
Configuring IGMP Proxy and Sparse Mode
Step 7ip address {ip-address subnet-mask 
negotiated}Specify an IP address and subnet mask for the 
dialer interface, or indicate that the IP address 
is to be negotiated.
Step 8ip pim {sparse | dense} -modeConfigure the dialer interface for PIM sparse 
mode or PIM dense mode.
Step 9ip igmp mroute-proxy loopback 0When used with the ip igmp proxy-service...

Page 372

 
Chapter 7      Router Feature Configuration
Configuring IGMP Proxy and Sparse Mode
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Configuration Example
The following example shows the relevant IGMP proxy and sparse mode 
commands. The Ethernet 0, Ethernet 1, and loopback 0 interfaces have been 
configured for PIM sparse mode; the PIM RP address has been defined as 
10.5.1.1.
ip pim rp-address 10.5.1.1 5 
access-list 5 permit 239.0.0.0 255.255.255.255
!
interface loopback 0
ip address...

Page 373

 
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Cisco 800 Series Software Configuration Guide
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Chapter 7      Router Feature Configuration
Configuring IP Security and GRE Tunneling
Multicast designated router (DR) is 10.2.1.2 (this system)
IGMP querying router is 10.2.1.2 (this system)
Multicast groups joined (number of users):
224.0.1.40 (1)
Configuring IP Security and GRE Tunneling
IP Security (IPSec) provides secure tunnels between two peers, such as two 
routers. You can define which packets are to be considered sensitive and sent...

Page 374

 
Chapter 7      Router Feature Configuration
Configuring IP Security and GRE Tunneling
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Configuring an Access List
Use the access-list command to create an access list that permits the GRE 
protocol and that specifies the starting and ending IP addresses of the GRE tunnel. 
Use the following syntax:
access-list 101 permit gre host ip-address host ip-address
In the preceding command line, the first host ip-address specifies the tunnel 
starting...

Page 375

 
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Cisco 800 Series Software Configuration Guide
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Chapter 7      Router Feature Configuration
Configuring IP Security and GRE Tunneling
Configuring a GRE Tunnel Interface
Follow the steps below to configure the generic routing encapsulation (GRE) 
tunnel interface, starting in global configuration mode.
Step 5crypto isakmp key name address ip-addressConfigure a pre-shared key and static IP 
address for each VPN client.
Step 6crypto ipsec transform-set name esp-des 
esp-md5-hmacDefine a...

Page 376

 
Chapter 7      Router Feature Configuration
Configuring IP Security and GRE Tunneling
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Configuring the Ethernet Interfaces
Perform the following tasks to configure the Ethernet 0 and Ethernet 1 interfaces, 
starting in global configuration mode.
Configuring Static Routes
Complete the following steps to configure static routes, starting in global 
configuration mode.
Step 5crypto map nameAssociate a configured crypto map to the 
tunnel 0...

Page 377

 
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Cisco 800 Series Software Configuration Guide
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Chapter 7      Router Feature Configuration
Configuring IP Security and GRE Tunneling
Configuring and Monitoring High-Speed Crypto
Use the following command to enable high-speed crypto, starting with global 
configuration mode. 
crypto engine accelerator
To disable high-speed crypto, use the following command:
no crypto engine accelerator
To monitor high-speed crypto, use the following command:
show crypto engine accelerator statistic
For...

Page 378

 
Chapter 7      Router Feature Configuration
Configuring IP Security and GRE Tunneling
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Cisco 800 Series Software Configuration Guide
78-5372-06 service timestamps log datetime msec
no service password-encryption
!
hostname 831-uut1
!
memory-size iomem 10
!
ip subnet-zero
!
ip audit notify log
ip audit po max-events 100
!
crypto isakmp policy 1
encr 3des
authentication pre-share
crypto isakmp key grel address 100.1.1.1
!
crypto ipsec security-association lifetime seconds 86400
!
crypto ipsec...

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Chapter 7      Router Feature Configuration
Configuring IP Security and GRE Tunneling
!
access-list 151 permit gre host 100.1.1.2 host 100.1.1.1
! 
line con 0
no modem enable
stopbits 1
line aux 0
line vty 0 4
!
scheduler max-task-time 5000
The following example shows IPSec configuration on a Cisco 837 router. 
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname...

Page 380

 
Chapter 7      Router Feature Configuration
Configuring Multilink PPP Fragmentation and Interleaving
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Cisco 800 Series Software Configuration Guide
78-5372-06 ip address 1.1.1.1 255.255.255.0
ip mtu 1440
tunnel source ATM0
tunnel destination 100.1.1.1
crypto map mymap
!
interface Ethernet0
ip address 202.2.2.2 255.255.255.0
hold-queue 100 out
!
interface ATM0
ip address 100.1.1.2 255.255.255.0
no atm ilmi-keepalive
pvc 1/40
protocol ip 100.1.1.1 broadcast
encapsulation aa15snap
!
dsl operating-mode...
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