L2TPv3 Router-to-router Mode
Topology
tool : Dynamips
IOS : c7200-adventerprisek9-mz.122-33.SRC1.bin, c3640-jk9s-mz.124-16.bin
Purpose : Basic EoL2TPv3 (Router to Router Port Mode) configuration
how to configure for PE router
1. configure l2tp-class
!
no aaa new-model
ip subnet-zero
!
!
!
ip cef
l2tp-class L2TPv3
authentication
hello 30
hostname PE1
password n4rut0
!
!
2. configure pseudowire-class
!
!
pseudowire-class PSW-CLASS
encapsulation l2tpv3
protocol l2tpv3 L2TPv3
ip local interface Loopback0
ip pmtu
ip dfbit set
ip tos reflect
ip ttl 50
!
!
3. configure interface loopback
!
!
interface Loopback0
ip address 202.162.208.252 255.255.255.255
no clns route-cache
!
4. configure interface to CE router
!
interface FastEthernet1/0
no ip address
speed auto
duplex auto
no clns route-cache
xconnect 125.249.16.252 100 pw-class PSW-CLASS
!
– xconnect peer-ip-address vcid pw-class name
5. configure interface to outside
!
interface Serial2/0
no ip address
encapsulation frame-relay
serial restart-delay 0
no clns route-cache
!
interface Serial2/0.101 point-to-point
description to_P
ip address 202.162.208.1 255.255.255.252
no arp frame-relay
frame-relay interface-dlci 101
!
6. configure routing protocol (use OSPF)
!
router ospf 1
log-adjacency-changes
network 202.162.208.1 0.0.0.0 area 0
network 202.162.208.252 0.0.0.0 area 0
!
now for each CE router you can configre ip address on the same subnet example for CE1 192.168.1.1/24 and for CE2 192.168.1.10/24
for verivication use sho l2tun session all and ping between CE1&CE2
PE1#show l2tun session all
L2TP Session Information Total tunnels 1 sessions 1
Session id 1790963512 is up, tunnel id 3317585641
Remote session id is 898844641, remote tunnel id 3348702048
Remotely initiated session
Unique ID is 1
Session Layer 2 circuit, type is Ethernet, name is FastEthernet1/0
Session vcid is 100
Circuit state is UP
Local circuit state is UP
Remote circuit state is UP
Call serial number is 2696400001
Remote tunnel name is PE2
Internet address is 125.249.16.252
Local tunnel name is PE1
Internet address is 202.162.208.252
IP protocol 115
Session is L2TP signaled
Session state is established, time since change 01:23:57
471 Packets sent, 92 received
83694 Bytes sent, 37303 received
Last clearing of counters never
Counters, ignoring last clear:
471 Packets sent, 92 received
83694 Bytes sent, 37303 received
Receive packets dropped:
out-of-order: 0
total: 0
Send packets dropped:
exceeded session MTU: 0
total: 0
DF bit on, ToS reflect enabled, ToS value 0, TTL value 50
UDP checksums are disabled
Session PMTU enabled, path MTU is 1500 bytes
No session cookie information available
FS cached header information:
encap size = 24 bytes
45000014 00004000 32731DE3 CAA2D0FC
7DF910FC 359347E1
Sequencing is off
Conditional debugging is disabled
PE1#
CE2#ping 192.168.1.1 size 1600 repeat 20
Type escape sequence to abort.
Sending 20, 1600-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
…!!!!!!!!!!!!!!!!!
Success rate is 85 percent (17/20), round-trip min/avg/max = 484/691/1420 ms
If you want to see all configuration download at this link
