Well the broadband where I live is shocking. Although its now managed to creep up to a staggering 6mbps, it still well below what I’d hope for in todays world. On the bright side its quiet and we overlook countryside, so I guess you can’t have it all the time. As it happens I’m not the only one with ADSL speed issues so I thought I’d do some work on PPP multi-linking the 2 lines I have installed at home into one huge virtual bundle. I’m using a Cisco 1841 with 2 x ADSL cards (HWIC). On the LNS its fine, I just add:
to the Virtual Template. Now the configuration on the CPE
interface ATM0/0/0 bandwidth 1000 no ip address no atm ilmi-keepalive dsl operating-mode auto pvc 0/38 encapsulation aal5mux ppp dialer dialer pool-member 1 ! ! interface ATM0/1/0 bandwidth 1000 no ip address no atm ilmi-keepalive dsl operating-mode auto pvc 0/38 encapsulation aal5mux ppp dialer dialer pool-member 1 ! ! interface Dialer0 bandwidth 2000 ip address negotiated ip nat outside ip virtual-reassembly encapsulation ppp dialer pool 1 dialer idle-timeout 0 dialer persistent ppp authentication chap callin ppp chap hostname XXXXXX ppp chap password 0 XXXXXXX ppp multilink
When you connect it up, the sure enough there is a bundle formed and the speed when tested now gives me about 12mbps download and 2 mpbs upload – nice!
As a side note, I added the bandwidth statements to the ATM and dialer interfaces as you can see above. i also added a line to my radius file to set the bandwidth to any arbitrary number, just so long as when the bundle hooks up, it treats the lines as equal. If you don’t ‘stabilise’ it like this you will see a ‘weight’ when executing a
show ppp multilink
which gives some good output (from the CPE):
Virtual-Access3 Bundle name: DSL1 Remote Username: DSL1 Remote Endpoint Discriminator:  DSL1 Local Username: XXXXXX Local Endpoint Discriminator:  XXXXX Bundle up for 00:04:14, total bandwidth 2000, load 21/255 Receive buffer limit 24384 bytes, frag timeout 1000 ms Dialer interface is Dialer0 0/0 fragments/bytes in reassembly list 447 lost fragments, 28586 reordered 505/366985 discarded fragments/bytes, 0 lost received 0xEDCC received sequence, 0x8153 sent sequence Member links: 2 (max not set, min not set) Vi2, since 00:04:14 PPPoATM link, ATM PVC 0/38 on ATM0/0/0 Packets in ATM PVC Holdq: 0, Particles in ATM PVC Tx Ring: 0 Vi4, since 00:04:14 PPPoATM link, ATM PVC 0/38 on ATM0/1/0 Packets in ATM PVC Holdq: 0, Particles in ATM PVC Tx Ring: 0 No inactive multilink interfaces