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ISDN PRI Configuration - The 4 main steps in ISDN PRI configuration: i) Configure the ISDN switch type to be connected to. ii) Configure the T1 or E1 encoding and framing options. iii) Configure the T1 or E1 channel range for the DS0 channels used on this PRI. iv) Configure the interface settings (eg: PPP encapsulation, PPP authentication, IP address, dialer configuration) on the subinterface that representing the D channel. - The controller configuration mode is being used to configure ISDN PRI physical layer parameters, eg: encoding, framing, and the number of DS0 channels used on the PRI. Note: controller interface – L1 configuration; serial interface – L2 and L3 configurations. - Normally all 24 DS0 channels in the PRI will be fully utilized – 23 B channels and a D channel. - ISDN PRI T1 controller configuration on RT1: RT1#conf t Enter configuration commands, one per line. End with CNTL/Z. RT1(config)#controller t1 1/0 RT1(config-controller)#linecode b8zs RT1(config-controller)#framing esf RT1(config-controller)#pri-group timeslots 1-24 RT1(config-controller)#no shut RT1(config-controller)#exit RT1(config)# Note: The pri-group timeslots 1-31 controller subcommand is used instead when configuring ISDN E1 controllers. - ISDN PRI T1 configuration on RT1: RT1(config)#int serial1/0:23 RT1(config-if)#ip add 10.10.10.1 255.255.255.248 RT1(config-if)#encapsulation ppp RT1(config-if)#ppp authentication chap RT1(config-if)#dialer idle-timeout 300 RT1(config-if)#dialer fast-idle 10 RT1(config-if)#dialer map ip 10.10.10.2 broadcast name RT2 11111111 RT1(config-if)#dialer map ip 10.10.10.3 broadcast name RT3 22222222 RT1(config-if)#dialer-group 2 RT1(config-if)#no shut RT1(config-if)#^Z RT1# - DDR configuration is configured on the D channel. A T1 connection consists of 24 channels (numbered from 0 to 23); while an E1 connection consists of 31 channels (numbered from 0 to 31). The subinterfaces 23 and 15 represent the D channel of T1 and E1 respectively. Note: T1 = US standards. - There is no SPID configuration required, as ISDN PRI circuits do not use SPID. 199 Copyright © 2008 Yap Chin Hoong yapchinhoong@hotmail.com
DDR Dialer Profiles Configuration - Legacy DDR associates dial configuration details with physical interfaces. When there are multiple BRIs or PRIs available, legacy DDR is only able to dial to a set of sites with an interface, and another set of sites with the other interface. Routes to A & B Routes to C & D DDR 1 boring Discard interesting BRI0 Figure 27-4: Legacy DDR with 2 BRIs and 4 Remote Sites - The router in Figure 27-4 can be configured to route packets to site A and B through BRI0, and route packets to site C and D through BRI1, with 2 different dialer groups on the BRI interfaces. - The limitation of legacy DDR in this scenario is it cannot be configured to dial to all remote sites with any available B channel on either BRI, as the configured static routes would route packets out a single BRI and hence only a single BRI can be used to reach a particular remote site. - Dialer profiles overcome the limitation and allow greater flexibility by disassociating the dial configuration details from the physical interfaces, and pool multiple interfaces to allow a router to use an available B channel on any interface in the pool to dial and connect to a remote site. Routes to A – D DDR 1 DDR 2 boring Discard boring Discard interesting interesting Dialer Interface BRI1 Figure 27-5: DDR Dialer Pool with 2 BRIs and 4 Remote Sites - With DDR dialer profiles configuration, most of the DDR interface configurations are moved from physical interfaces to virtual interfaces called dialer interfaces. - A BRI or PRI physical interface can be a member of a pool of available ISDN interfaces. Whenever an interesting packet is being routed out the dialer interface and triggered ISDN DDR, any ISDN interface with an available B channel will be selected from the pool for dialing. 200 BRI0 BRI1 Pool of BRIs PSTN PSTN Copyright © 2008 Yap Chin Hoong yapchinhoong@hotmail.com A B C D A B C D
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CCNA Complete Guide 2nd Edition Yap
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CCNA Complete Guide 2nd Edition Cop
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Upper Layers Lower Layers Applicati
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Cisco Hierarchical Model - Defined
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Header Length (4) Source Port (16)
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- Socket is a communication channel
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- The length of an IP address is 32
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- The following section discusses s
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- Below lists the 2 sublayers in th
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- Each switch port does not share t
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- Below lists the switch internal p
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Physical Layer - The physical layer
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- Another way to reduce emissions i
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Figure 3-7: Single-Mode and Multimo
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Wireless AP Switch Figure 3-8: 802.
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- Below lists the common IOS CLI er
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RT1#show running-config interface F
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- Cisco IOS treats a mistyped comma
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- Below describes the STP convergen
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- Refer back to Figure 5-1B, assume
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- A switch running RSTP only need 6
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Port Security Configuration - Port
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SW2# 00:25:00: STP: VLAN0001 new ro
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- Both protocols utilize a 12-bit V
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Layer 4 Switching (Content Switchin
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- VTP Pruning provides a way to pre
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VLAN Trunking Protocol Configuratio
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- VLAN information will not be prop
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- Private IP addresses are non-rout
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- Some materials calculate the numb
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Cisco Discovery Protocol (CDP) c250
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- CDP is enabled by default. The no
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Troubleshooting IP - Internet Contr
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- Firstly, PC1 purposely sends out
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- Below describes the operation of
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Maximum Hop Count Hop count metric
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- Invalid Timer specifies how long
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- Initial configuration on RT2: Rou
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- Static Routing configuration on R
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- RIPv1 and IGRP are classful routi
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- IGRP configuration on RT2: RT2(co
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MISC IP Routing Commands - The pass
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- OSPF uses a reliable protocol to
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- OSPF areas break up a network so
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- EIGRP uses the same formula as us
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- Autosummarization EIGRP supports
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- OSPF Single-Area configuration on
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- The show ip ospf database EXEC co
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OSPF Multiarea Configuration Area 1
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- Below lists the different termino
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- Verify the EIGRP configuration on
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- When a link to a neighbor fails,
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- Below shows the beauty of VLSM. B
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- RT1 and RT3 are summarizing route
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- RIPv1 and IGRP perform autosummar
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RT1#sh ip route Gateway of last res
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MTU and Fragmentation - Maximum Tra
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- Figure 17-1 shows the usage of CI
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- Static NAT performs one-to-one ma
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172.16.1.1 172.16.1.2 172.16.1.3 17
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- Below shows the IP NAT debugging
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- The access list indicates whether
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- Access Control List (ACL) is the
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- Below lists some other usages of
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- Standard IP Access Lists configur
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RT2#sh access-lists example01 Exten
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WAN Network RT1 CSU/DSU CSU/DSU RT2
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Remote Access Technologies - Remote
Page 151 and 152: Digital Subscriber Lines (DSL) - DS
Page 153 and 154: Point-to-Point Serial Links (Leased
Page 155 and 156: - Comparisons between synchronous a
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Page 163 and 164: - Comparisons between Frame Relay L
Page 165 and 166: RT1 RT2 RT3 Figure 23-7A: RT1 with
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Page 169 and 170: - IETF Frame Relay encapsulation ty
Page 171 and 172: RT1 Frame Relay RT2 DLCI 101 Frame
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Page 187 and 188: Wireless Management - WLANs require
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Page 191 and 192: - ISDN offers very fast call setup
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Page 199 and 200: DDR Step 4: Determining when to ter
Page 201: - The show interfaces bri{num:0 | 1
Page 205 and 206: - Note: IP addresses are configured
Page 207 and 208: - Below show the routing tables on
Page 209 and 210: - The configuration above defines 2
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Page 213 and 214: Catalyst Switch IOS Upgrade Procedu
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Page 217 and 218: Cisco Router Password Recovery Proc
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Page 223 and 224: - The 3 possible Frame Relay PVC st
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Page 235 and 236: Decimal Hex Binary Decimal Hex Bina
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Page 243 and 244: - The 5-4-3 repeater deployment rul
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Page 247 and 248: The TCP Connection States timeout s
Page 249 and 250: - Q: How does a client application
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TCP Selective Acknowledgment (SACK)
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- Local Proxy ARP is used when ther
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Spanning Tree Protocol Port ID - Wh
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The Problem of Router-on-a-Stick Co
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- Sample Subnet Zero configuration:
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The permanent keyword in the Static
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RIPv1 and VLSM RT1 RT4 Figure A6-9:
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- Below shows the NAT operations on
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Bidirectional (2-Way) NAT PC1 172.1
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- Note: A router does not require a
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The Access Control List established
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Switch Port Access Control Lists -
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- Below shows a sample Dynamic Acce
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Router(config)#ip access-list exten
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Optional PPP Commands - The compres
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- Below shows the output of the PPP
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- Below shows the output of the PPP
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- Below configure the username and
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IEEE 802.11 Standards and Specifica
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- Figure A6-20 shows the frame form
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- Below lists the IEEE 802.11 manag
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IEEE 802.11 Types and Subtypes Type
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Client (Supplicant) EAPOL-Start EAP
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- IPsec-based VPN is comprised of 2
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- IPsec supports the following 3 ty
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Version Header Length Time To Live
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- The authentication pre-share ISAK
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Troubleshooting ISDN E1/T1 Physical
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- Below addresses ISDN E1/T1 contro
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Troubleshooting ISDN Layer 2 - Unde
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Troubleshooting ISDN Layer 3 - Only
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ISDN Loopback Test Call - In a loop
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96 Number changed. The called numbe
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C2 Channel type not implemented. Th
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locking state, STP, 39 BNC, 27 bool
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show vlan, 57 show vtp status, 58 s
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framing, 22 MAC addresses, 22 stand
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K keepalives EIGRP, 95 Frame Relay,
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PAT (Port Address Translation), 127
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star topologies, 25 startup-config
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