adsl

Telecom Italia – IPv6 Pilot on Cisco

June 8, 2012 / Cisco, Networking / leo

To my amazement, Telecom Italia released a pilot project of IPv6 deployment on residential/dynamic ip only adsl internet access, but on theirs support site there’s configuration only for some useless systems. So, I’ve decided to write a configuration for Cisco platform.

Usually the typical Telecom Italia PPPoE or PPPoA ADSL connection with dynamic IPv4 only was authenticated with “aliceadsl” as user and password, now with bran new credential along IPv4 the endpoint router advertise a IPv6 /64 class (always dynamic).

username: adsl@alice6.it
password: IPV6@alice6

And now IOS configuration:

– ATM inteface:

interface ATM0/0/0 no ip address atm restart timer 300 no atm ilmi-keepalive dsl operating-mode auto hold-queue 100 in ! interface ATM0/0/0.1 point-to-point pvc 8/35 vbr-nrt 380 380 oam-pvc manage encapsulation aal5mux ppp dialer dialer pool-member 1

– Dialer inteface:

interface Dialer0 mtu 1492 ip address negotiated ip nbar protocol-discovery ip flow ingress ip virtual-reassembly encapsulation ppp dialer pool 1 dialer-group 1 ipv6 address autoconfig ipv6 enable no cdp enable ppp authentication chap callin ppp chap hostname adsl@alice6.it ppp chap password 0 IPV6@alice6 ppp pap sent-username adsl@alice6.it password 0 IPV6@alice6

– Route configuration:

ip route 0.0.0.0 0.0.0.0 Dialer0 ipv6 route 2000::/3 Dialer0

You can check with following command:

route01#sh ip int brief | sec Dialer0 Dialer0 XXX.XXX.XXX.XXX YES IPCP up up route01#sh ipv6 int brief | sec Dialer0 Dialer0 [up/up] FE80::1 2A01:2003:xxxx:xxxx::1

You can discover your /64 assigned class with:

route01#sh ipv6 int di0 | sec Global Global unicast address(es): 2A01:2003:xxxx:xxxx::1, subnet is 2A01:2003:xxxx:xxxx::/64 [PRE] valid lifetime 2591993 preferred lifetime 604793 route01#

I’ve left out NAT and other further configuration.

Update: prefix delegation

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Cisco – ATM Clockrate

April 21, 2010 / Cisco / leo

If you have performance problem on Cisco 1721, Cisco 2610XM-2651XM, Cisco 2691, and Cisco 3660, with WIC-1DSL – IOS 12.3(2) or above, probably depends on the default value associated with ALL5 clockrate.

If yuo wanna check type the following command on your router:

hellroute01#show controller atm0/0 | include ATM0/0 Interface: ATM0/0, Hardware: DSLSAR (with Alcatel ADSL Module), State: up SCC0 = 2600000 (ATM0/0) SCC3 = 1000000 (ATM0/0) hellroute01#

If you get 2600000 (default value) on SCC0 or SCC1 your downlink speed rate probably is limitated at about 300 KB/s

For get full speed, put max supported value on aal5 clockrate like this:

hellroute01(config)#int atm0/0 hellroute01(config-if)#clock rate aal5 ? 1000000 1300000 1600000 2000000 2600000 (default) 3200000 4000000 5300000 7000000
<1000000-7000000> clock rates in bits per second, choose one from above
hellroute01(config-if)#clock rate aal5 7000000

Becareful the atm interface is automatically restart for apply the change. Then you lost connection on this interface.

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