Hi Olu, here it is. I've labbed it again. There is something in it and I pretty
sure someone at ipexpert knows about this. I bumped into this as I was doning
Lab 1 vol 3, the requirement clearly states not to use IPCP on the PPoE task,
later on a different task we are asked to enable MPLS on that link. I didn't
follow the DHCP requirement, can't remember why, but I am learning that the
more you break things the more you learn.
Starting with only PPoE configured.
*****************R6
R6(config)#do sh ip int bri | ex un
Interface IP-Address OK? Method Status
Protocol
Virtual-Access1.1 172.31.200.6 YES TFTP up up
Virtual-Template1 172.31.200.6 YES manual down down
R6(config)#do show run | s Dialer|Virtual|pool|dhcp
interface Virtual-Template1
mtu 1492
ip address 172.31.200.6 255.255.255.128
peer default ip address pool TEST
ip local pool TEST 172.31.200.7
R6(config)#do ping 172.31.200.7
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.200.7, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
R6(config)#
*************R7
R7(config)#do sh ip int br | ex un
Interface IP-Address OK? Method Status
Protocol
Dialer1 172.31.200.7 YES IPCP up up
R7(config)#do show run | s Dialer|Virtual|pool|dhcp
pppoe-client dial-pool-number 1
interface Dialer1
mtu 1492
ip address negotiated
encapsulation ppp
dialer pool 1
R7(config)#do ping 172.31.200.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.200.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/4 ms
-------------------------------------------------------------------
Assing loopback, adding static routes, enabling mpls
*********************R6
R6(config)#do sh ip int bri | ex un
Interface IP-Address OK? Method Status
Protocol
Virtual-Access1.1 172.31.200.6 YES TFTP up up
Virtual-Template1 172.31.200.6 YES manual down down
Loopback0 192.168.6.6 YES manual up up
R6(config)#do show run | s Dialer|Virtual|pool|dhcp
interface Virtual-Template1
mtu 1492
ip address 172.31.200.6 255.255.255.128
mpls ip
peer default ip address pool TEST
ip local pool TEST 172.31.200.7
R6(config)#do sh mpls ldp n
Peer LDP Ident: 192.168.7.7:0; Local LDP Ident 192.168.6.6:0
TCP connection: 192.168.7.7.62159 - 192.168.6.6.646
State: Oper; Msgs sent/rcvd: 8/8; Downstream
Up time: 00:00:55
LDP discovery sources:
Virtual-Access1.1, Src IP addr: 172.31.200.7
Addresses bound to peer LDP Ident:
172.31.200.7 192.168.7.7
R6(config)#do ping 172.31.200.7
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.200.7, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R6(config)#do ping 192.168.7.7
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.7.7, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
R6(config)#
R7(config)#do sh ip int bri | ex un
Interface IP-Address OK? Method Status
Protocol
Dialer1 172.31.200.7 YES IPCP up up
Loopback0 192.168.7.7 YES manual up up
R7(config)#do show run | s Dialer|Virtual|pool|dhcp
pppoe-client dial-pool-number 1
interface Dialer1
mtu 1492
ip address negotiated
encapsulation ppp
dialer pool 1
mpls ip
R7(config)#do sh mpls ldp nei
Peer LDP Ident: 192.168.6.6:0; Local LDP Ident 192.168.7.7:0
TCP connection: 192.168.6.6.646 - 192.168.7.7.62159
State: Oper; Msgs sent/rcvd: 11/11; Downstream
Up time: 00:03:38
LDP discovery sources:
Dialer1, Src IP addr: 172.31.200.6
Addresses bound to peer LDP Ident:
172.31.200.6 192.168.6.6
R7(config)#do ping 172.31.200.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.200.6, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R7(config)#do ping 192.168.6.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.6.6, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R7(config)#
------------------------------------------------------------------------------------------
Let's change ip assignement to DHCP
R6(config-if)#do sh ip int bri | ex un
Interface IP-Address OK? Method Status
Protocol
Virtual-Access1.1 172.31.200.6 YES TFTP up up
Virtual-Template1 172.31.200.6 YES manual down down
Loopback0 192.168.6.6 YES manual up up
R6(config-if)#do show run | s Dialer|Virtual|pool|dhcp
ip dhcp excluded-address 172.31.200.0 172.31.200.6
ip dhcp excluded-address 172.31.200.8 172.31.200.255
ip dhcp pool TESTDHCP
network 172.31.200.0 255.255.255.128
interface Virtual-Template1
mtu 1492
ip address 172.31.200.6 255.255.255.128
mpls ip
no peer default ip address
R6(config-if)#do sh mpls ldp n
Peer LDP Ident: 192.168.7.7:0; Local LDP Ident 192.168.6.6:0
TCP connection: 192.168.7.7.25521 - 192.168.6.6.646
State: Oper; Msgs sent/rcvd: 8/8; Downstream
Up time: 00:01:04
LDP discovery sources:
Virtual-Access1.1, Src IP addr: 172.31.200.7
Addresses bound to peer LDP Ident:
192.168.7.7 172.31.200.7
R6(config-if)#do ping 172.31.200.7
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.200.7, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
R6(config-if)#
********************R7
R7(config-if)#do sh ip int bri | ex un
Interface IP-Address OK? Method Status
Protocol
Dialer1 172.31.200.7 YES DHCP up up
Loopback0 192.168.7.7 YES manual up up
R7(config-if)#do show run | s Dialer|Virtual|pool|dhcp
pppoe-client dial-pool-number 1
interface Dialer1
mtu 1492
ip address dhcp
encapsulation ppp
dialer pool 1
mpls ip
R7(config-if)#do sh mpls ldp n
Peer LDP Ident: 192.168.6.6:0; Local LDP Ident 192.168.7.7:0
TCP connection: 192.168.6.6.646 - 192.168.7.7.25521
State: Oper; Msgs sent/rcvd: 9/9; Downstream
Up time: 00:01:55
LDP discovery sources:
Dialer1, Src IP addr: 172.31.200.6
Addresses bound to peer LDP Ident:
192.168.6.6 172.31.200.6
R7(config-if)#do ping 172.31.200.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.31.200.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
R7(config-if)#
From: [email protected]
Date: Fri, 11 May 2012 19:07:46 +0100
Subject: Re: [OSL | CCIE_RS] PPPoE IPCP/DCHP and MPLS
To: [email protected]
CC: [email protected]
Fulvio,
for the two configs (DHCP & IPCP) post output of
show run | s Dialer|Virtual|pool|dhcp
along with
show ip int dialer | i Internet
On 11 May 2012 09:38, Fulvio allegretti <[email protected]> wrote:
Hi there,
I have bumped into this and I am trying to understand the logic behind it. The
set up is two routers running PPPoE with the client ip address being negotiated
by IPCP. I then run MPLS over it, just adding mpls ip on the interfaces, I've
got my static routes to the loopbacks, neighbors come up, I've got labels,
it's all good execept that I can't ping the other end, I can't sill ping the
loopbacks. Change the ip assignment method to DHCP and it is all working.
Change it back to IPCP, no pin. Remove MPLS, ping is back. Put MPLS back on,
no ping. Change to DHCP ping is back. You get the picture.........SIIL (stuck
in ignorant loop that is). Fulvio
_______________________________________________
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Olugbenga Oyebande
MD, DAIT
234-803-302-5287
http://www.dait-ng.com
Cisco Networks, Network Security & Quality of Service
DAIT Linux Enterprise Network Servers, Web Portal Projects
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View Olugbenga Oyebande's profile
_______________________________________________
For more information regarding industry leading CCIE Lab training, please visit
www.ipexpert.com
Are you a CCNP or CCIE and looking for a job? Check out
www.PlatinumPlacement.com
http://onlinestudylist.com/mailman/listinfo/ccie_rs
