CenturyLink 6rd on Cisco IOS

I have a static IPv4 address from CenturyLink (x.y.z.198). To find my corresponding IPv6 6rd address I need to convert my IPv4 address to hex and append CenturyLink’s 6rd prefix.

My ipv4 address: x.y.z.198
My IPv6 6rd address: XX:YY:ZZ:C6
where XX (in hex)=x (in decimal)

Prepending CenturyLink’s IPv6 6rd prefix (2602::/24) to my 6rd address leaves me with 2602:00XX:YYZZ:C600::

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SSHFS Mount on Ubuntu 12.04 LTS

Today, Ubuntu 12.04.1 (GNOME Classic) was giving me this error when unmounting and SSHFS drive: “mount disagrees with the fstab.”

The SSHFS syntax has changed a bit recently. I modified my fstab to the syntax below and all is well.

In /etc/fstab:

USER@SERVER:/path/to/project    /mnt/server   fuse.sshfs    user,noauto,transform_symlinks,idmap=user 0 0

CenturyLink DSL Setup on a Cisco 1720

I turned up a 7Mbps DSL connection with CenturyLink this evening. Here’s the configuration I used to get the circuit working. The ‘debug ppp authentication command’ helped a lot, too.

Note: To get the username and password I had to call CenturyLink technical support. The CenturyLink provisioned modems must have some mechanism to get the necessary information automatically.

interface ATM0
 no ip address
 no atm ilmi-keepalive
 dsl operating-mode auto
 pvc 0/32
  dialer pool-member 1
  protocol ppp dialer
interface Dialer0
 ip address negotiated
 ip nat outside
 ip nbar protocol-discovery
 encapsulation ppp
 dialer pool 1
 ppp pap sent-username USERNAME password PASSWORD
int FastEthernet0
 ip nat inside
ip nat inside source list 111 interface Dialer0 overload
ip route Dialer0
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