From: simon hart (simon@harttel.com)
Date: Sat Oct 08 2005 - 11:01:30 GMT-3
Hi Folks,
I am a little confused with the answer given on the PPPoE section of Lab2
within IE. As far as I can see it is overconfigured.
The end that is initiating the ppp session - R3 is configured as
vpdn enable
vpdn-group 1
request-dialin
protocol pppoe
int e0/0
pppoe enable
pppoe-client dial-pool-number 1
int dial 1
dialer pool 1
dialer pool persistent
However connectivity to the VPDN server can be achieved using only the
following
interface e0/0
pppoe enable
pppoe-client dial-pool-number 1
int dial 1
dialer pool 1
It seems to me that one does not need to configure the vpdn group or vpdn
enable. R3 is not performing as a virtual private dial network 'server' it
is requesting connectivity of R4 which is performing the vpdn function.
This four lines of code as far as I can see are superflous - is my thinking
correct???
On Interface Dialer 1, there is no need for Dialer persistent. This indeed
would be required if this was an ISDN circuit or DDR type circuit but the
ethernet is always up, there is no requirement for interesting traffic to
bring the dialer up. It appears that the IOS will start sending LCP's to
the other end regardless of whether there is interesting traffic or a dialer
persistent statement
Here is a debug below:
interface Dialer1
ip address dhcp client-id Ethernet0
encapsulation ppp
dialer pool 1 --------------------------------------- NO dialer persist or
dialer-group statements on this interface
Rack1R3(config)#int dial 1
Rack1R3(config-if)#no shut
Rack1R3(config-if)#
*Mar 1 02:25:15.355: %LINK-3-UPDOWN: Interface Dialer1, changed state to up
Rack1R3(config-if)#
*Mar 1 02:25:25.099: %DIALER-6-BIND: Interface Vi3 bound to profile Di1
*Mar 1 02:25:25.103: Vi3 PPP: Phase is DOWN, Setup
*Mar 1 02:25:25.107: Vi3 PPP: Using dialer call direction
*Mar 1 02:25:25.111: Vi3 PPP: Treating connection as a callout
*Mar 1 02:25:25.111: Vi3 PPP: Phase is ESTABLISHING, Active Open
*Mar 1 02:25:25.115: Vi3 PPP: No remote authentication for call-out
*Mar 1 02:25:25.119: Vi3 LCP: O CONFREQ [Closed] id 1 len 10
*Mar 1 02:25:25.123: Vi3 LCP: MagicNumber 0x00915D24 (0x050600915D24)
*Mar 1 02:25:25.131: %LINK-3-UPDOWN: Interface Virtual-Access3, changed
state to up
Can anyone enlighten as to why the extra code is added in the answer section
for this task?? Am I missing something here
Simon
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