2.3.b Implement and troubleshoot PPP

multilink point-to-point protocol

mlppp

create the multilink interface:

interface Multilink1
ip address 100.1.1.100 255.255.255.0
ppp multilink
ppp multilink group 1

add the interfaces to the group:

interface Serial1/1
no ip address
encapsulation ppp
ppp multilink group 1

interface Serial1/2
no ip address
encapsulation ppp
ppp multilink group 1

verify:

hub#sh ppp multilink active

Multilink1, bundle name is inet
Endpoint discriminator is inet
Bundle up for 00:03:45, total bandwidth 3088, load 1/255
Receive buffer limit 24000 bytes, frag timeout 1000 ms
0/0 fragments/bytes in reassembly list
0 lost fragments, 7 reordered
0/0 discarded fragments/bytes, 0 lost received
0xF received sequence, 0xE sent sequence
Member links: 2 active, 1 inactive (max not set, min not set)
Se1/1, since 00:03:45
    Se1/2, since 00:03:45
Se1/0 (inactive)

place nbar on the multilink:

interface Multilink1
ip address 100.1.1.100 255.255.255.0
ip nbar protocol-discovery
ppp multilink
ppp multilink group 1

spoke2#ping 100.1.1.100 rep 100 siz 1500

hub#sh ip nbar proto proto icmp

Multilink1
Input                    Output
—–                    ——
Protocol                 Packet Count             Packet Count
Byte Count               Byte Count
5min Bit Rate (bps)      5min Bit Rate (bps)
5min Max Bit Rate (bps)  5min Max Bit Rate (bps)
———————— ———————— ————————
icmp                     100                      0
150400                   0
3000                     0
6000                     0

configure chap:

inet#sh run | i user
username hub password 0 ccie

hub#sh run | i user
username inet password 0 ccie

hub#sh run int multi 1 | i auth
ppp authentication chap

verify:

chap