Networking Essentials – Eric Vanderburg © 2005

PPP, ISDN, & Frame RelayPPP, ISDN, & Frame RelayChapters 11-12Chapters 11-12

Networking Essentials – Eric Vanderburg © 2005

PPPPPP Interface serial 0Interface serial 0

Encapsulation pppEncapsulation ppp Ppp authentication chapPpp authentication chap

Username CNT password classUsername CNT password class Authentication will succeed if the Authentication will succeed if the

password is the same on both ends. password is the same on both ends.

Networking Essentials – Eric Vanderburg © 2005

Functions & Reference Functions & Reference PointsPoints

U reference point always connects to U reference point always connects to the ISP on one endthe ISP on one end Other end is connected to NT1/TE1 on the Other end is connected to NT1/TE1 on the

router or NT1 devicerouter or NT1 device NT1 device uses reference pt S/T to connect to NT1 device uses reference pt S/T to connect to

the router TE1the router TE1 NT1 device uses reference pt T to connect to NT1 device uses reference pt T to connect to

NT2, NT2 uses S reference pt to connect to the NT2, NT2 uses S reference pt to connect to the router TE1. (NT2 is often used with a PBX router TE1. (NT2 is often used with a PBX CPE)CPE)

NT1 device using reference pt S/T connects to NT1 device using reference pt S/T connects to TA, TA uses R reference pt to connect to TE2TA, TA uses R reference pt to connect to TE2

Networking Essentials – Eric Vanderburg © 2005

ISDN Configuration (BRI)ISDN Configuration (BRI) Isdn switch-type basic-ni1Isdn switch-type basic-ni1 Switch typesSwitch types

Basic-Dms100, Basic-ni1, & basic-5ess Basic-Dms100, Basic-ni1, & basic-5ess (North America)(North America)

Basic-net3 (Europe & UK)Basic-net3 (Europe & UK) NTT (Japan)NTT (Japan) Vn3 (France)Vn3 (France) 1tr6 (Germany)1tr6 (Germany) Ts013 (Australia)Ts013 (Australia)

Networking Essentials – Eric Vanderburg © 2005

ISDN ConfigurationISDN Configuration Interface bri 0Interface bri 0

Isdn spid1 83940293774856Isdn spid1 83940293774856 Isdn spid2 93849380964893Isdn spid2 93849380964893 Dialer idle-timeout 300 (disconnect after Dialer idle-timeout 300 (disconnect after

300)300) Dial wait-for-carrier time 20 (wait 20 secs for Dial wait-for-carrier time 20 (wait 20 secs for

response from ISP)response from ISP) Dialer fast-idle 120Dialer fast-idle 120 Ppp multilinkPpp multilink Dialer load-threshold 50 either (dial another Dialer load-threshold 50 either (dial another

line if using 50% capacity)line if using 50% capacity)

Networking Essentials – Eric Vanderburg © 2005

ISDN ConfigurationISDN Configuration Dialer-list 1 protocol ip list 101Dialer-list 1 protocol ip list 101 Interface bri 0Interface bri 0

Dialer-string 14405551212 (always Dialer-string 14405551212 (always dial this number)dial this number)

Dialer map ip 172.16.2.1 broadcast Dialer map ip 172.16.2.1 broadcast name LA 14045967491name LA 14045967491

Dialer-group 1Dialer-group 1

Networking Essentials – Eric Vanderburg © 2005

ISDN Configuration (PRI)ISDN Configuration (PRI) Controller t1 1/0Controller t1 1/0

Framing esf (how to interpret frames)Framing esf (how to interpret frames) Sf, esf, or crc4Sf, esf, or crc4

Linecode b8zs (encoding – what is 0 &1)Linecode b8zs (encoding – what is 0 &1) Ami, b8zs, or hdb3Ami, b8zs, or hdb3

Pri-group timeslots 1-24Pri-group timeslots 1-24 Interface serial 1/0:23 (last Interface serial 1/0:23 (last

subinterface representing the D subinterface representing the D channel)channel) Configuration similar to BRIConfiguration similar to BRI

Networking Essentials – Eric Vanderburg © 2005

ISDN ConfigurationISDN Configuration Create an interface for each remote Create an interface for each remote

sitesite Interface dialer 1Interface dialer 1

Ip address…Ip address… Encapsulation pppEncapsulation ppp Ppp authentication chapPpp authentication chap Dialer remote-name LADialer remote-name LA Dialer string 172.16.2.1 14045967491Dialer string 172.16.2.1 14045967491 Dialer-group 1 (defines interesting traffic)Dialer-group 1 (defines interesting traffic) Dialer pool 3 (BRI lines can be in this)Dialer pool 3 (BRI lines can be in this)

Networking Essentials – Eric Vanderburg © 2005

ISDN ConfigurationISDN Configuration Interface serial 1/0:0Interface serial 1/0:0

Encapsulation pppEncapsulation ppp Ppp authentication chapPpp authentication chap Isdn spid 555094830928394Isdn spid 555094830928394 Dialer pool-member 3Dialer pool-member 3

Networking Essentials – Eric Vanderburg © 2005

Frame RelayFrame Relay Interface serial 0Interface serial 0

Encapsulation frame-relayEncapsulation frame-relay Frame-relay lmi type ansi (router to Frame-relay lmi type ansi (router to

switch)switch) Ansi, q933a, or Cisco (Cisco is default)Ansi, q933a, or Cisco (Cisco is default)

Frame-relay interface-dlci 50 ietfFrame-relay interface-dlci 50 ietf Optional ietf/cisco (cisco is default. Set to Optional ietf/cisco (cisco is default. Set to

ietf if using another brand of router)ietf if using another brand of router)

Networking Essentials – Eric Vanderburg © 2005

Frame RelayFrame Relay If you are not using inverse arpIf you are not using inverse arp Interface serial 0Interface serial 0

No frame-relay inverse-arpNo frame-relay inverse-arp Frame-relay map ip 192.168.0.2 51 Frame-relay map ip 192.168.0.2 51

broadcastbroadcast (broadcast allows broadcasted routing (broadcast allows broadcasted routing

updates to be sent unicast to each updates to be sent unicast to each mapped router)mapped router)

Show frame-relay mapShow frame-relay map

Networking Essentials – Eric Vanderburg © 2005

Frame RelayFrame Relay SubinterfacesSubinterfaces Interface serial 0.1 point-to-pointInterface serial 0.1 point-to-point

Ip address…Ip address… Frame-relay interface-dlci 51Frame-relay interface-dlci 51

Interface serial 0Interface serial 0 Encapsulation frame-relayEncapsulation frame-relay

Interface serial 0.1 multipointInterface serial 0.1 multipoint ip address…ip address… Frame-relay interface-dlci 51Frame-relay interface-dlci 51 Frame-relay interface-dlci 52Frame-relay interface-dlci 52