DDR Configuration

DDR Legacy Concepts and Configuration

Step 1: Routing Packets Out the Interface to be Dialed

ip route 192.168.0.0 255.255.255.0 10.0.0.1

Step 2: Determining the Subset of the Packets That Trigger the Dialing Process

access-list 101 permit tcp any host 192.168.0.1 eq 80

! all ip packets being considered interesting
dialer-list 1 protocol ip permit

! all packets to the web servers consider interesting
dialer-list 2 protocol ip list 101

interface bri 0
encapsulation ppp
ip address 10.0.0.2 255.255.255.0

! Use this one if all ip is considered interesting
dialer-group 1

! or use next statement to trigger for web to server ! if you type the next command, it would replace the dialer-group 1
! command; only one dialer-group is allowed per interface
dialer-group 2

Step 3: Dialing (Signaling)

One site:
=========
interface bri 0
encapsulation ppp
dialer string 818186666 <- the phone number that is to be used to signal a connection
ip address 10.0.0.2 255.255.255.0
! Use this one if all ip is considered interesting
dialer-group 1

Multi sites:
============
interface bri 0
encapsulation ppp
ip address 10.0.0.2 255.255.255.0
! Use this one if all ip is considered interesting
dialer map ip 192.168.0.1 broadcast name KL 1800111111
dialer map ip 192.168.0.2 broadcast name Sing 1899933488
dialer-group 1

VLAN

1. Create and name two VLANs
Switch_A#vlan database
Switch_A(vlan)#vlan 2 name VLAN2
Switch_A(vlan)#vlan 3 name VLAN3

2. Assign ports to VLAN 2
Switch_A#configure terminal
Switch_A(config)#interface fastethernet 0/2
Switch_A(config-if)#switchport mode access
Switch_A(config-if)#switchport access vlan 2

Telnet sessions

1. Suspend the current Telnet session: Ctrl-Shift-6 x
• enter
2. show sessions: Reveals all sessions are in used.
3. To Resume the previouly suspended telnet session:
• Type the number of the session shown on show sessions

CDP

1. show cdp interface
2. show cdp neighbors
3. show cdp neighbors detail
4. debug cdp packets
5. undebug all
6. show cdp traffic
7. clear cdp counters

Using Router show commands

1. show ?
2. show version
3. show clock
4. show hosts
5. show users
6. show history
7. show arp
8. show flash
9. show running-config
10. show starup-config
11. show interface
12. show protocol

Router Operation

Using TFTP for IOS Backup & Updates

Router#copy tftp flash

Using TFTP for Configuration File Backups & UPdates

Router#copy running-config tftp
Router#copy startup-config tftp
Router#copy tftp startup-config

Cisco Networking Basics

Private Addressing

1. 1. 10.0.0.0 - 10.255.255.255
2. 172.16.0.0 - 172.31.255.255
3. 192.168.0.0 - 192.168.255.255

Access to Router

1. Console Port (Protocol: EIA/TIA-232)
2. Auxiliary Port (Protocol: EIA/TIA-232)
3. Telnet / Secure Shell (SSH)
4. HTTP / HTTPS Server
5. SNMP

Security Device Manager (SDM)

1. never try ...

Router Memory

1. RAM/DRAM
• ...
2. NVRAM
• nonvolatile RAM (memory that will retain information after losing power)
• Cisco routers store a copy of the router's configuration file in NVRAM
3. Flash Memory
• Differs from NVRAM in that it can be erased & reporgrammed as needed.
• Store one or more copies of the IOS software
4. ROM
• Hold a bootstrap program
• When boot from ROM, the first thing you'll see is the romon>> prompt

Router Ports & Modules

1. Routers come in 2 major parts
• Chassis
• The actual box and basic components inside it, such as power supply, fans, rear and front faceplates, indicator lights, and slots
• Ports and modules
• The printed circuit boards that slide into the router box
2. ...

Cisco Router Models

1. SOHO Routers
• Cisco 90 series, 800 series, SB 100 series
2. Midrange Cisco Routers
• 1700, 1800, 2600, 2800, 3600, 3700, 3800
3. Backbone Routers
• 7200, 7300, 7500, 7600, 10700, 10000, 12000, CRS-1

IOS Feature Sets

1. IP Base
2. IP Voice
3. Enterprise Base
4. Advanced Security
5. Enterprise Services
6. Advanced IP Services
7. Advanced Enterprise Services

Software Product Variant

1. Basic
2. Plus
3. Enryption