Different masks, DHCP reflects the subnet. IPCP R7#show ip int dialer 1 | i Internet Internet address is 172.31.200.7/32 DHCP R7(config-if)#do show ip int dialer 1 | i Internet Internet address is 172.31.200.7/25
From: [email protected] Date: Fri, 11 May 2012 22:10:47 +0100 Subject: Re: [OSL | CCIE_RS] PPPoE IPCP/DCHP and MPLS To: [email protected] CC: [email protected] show ip int dialer | i Internet I wanted to compare the masks we got on the dialer from DHCP and IPCP On 11 May 2012 22:01, Fulvio allegretti <[email protected]> wrote: 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 _______________________________________________ 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 -- 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 Broadband Internet Deployment & ISP Consultancy View Olugbenga Oyebande's profile -- 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 Broadband Internet Deployment & ISP Consultancy 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
