L2VPN configuration using L2TPV3:
·
Core
need not be MPLS.
·
It
simply creates P2P tunnels.
·
Both
the CEs appear as if they are in the same broadcast domain.
·
Let
me take a small topology to configure L2TPV3
Configuration:
CE1#show run int fa0/0
Building
configuration...
Current
configuration : 93 bytes
!
interface
FastEthernet0/0
ip address 10.1.1.1 255.255.255.0
duplex auto
speed auto
end
CE1#
PE1#show run int fa0/0
Building
configuration...
Current
configuration : 128 bytes
!
interface
FastEthernet0/0
no ip address
duplex auto
speed auto
xconnect 4.4.4.4 1 encapsulation l2tpv3
pw-class TEST
end
è 4.4.4.4 is the loopback0 of PE2
PE1#show run | begin TEST
pseudowire-class
TEST
encapsulation l2tpv3
ip local interface Loopback0
!
CE2#show run
int fa0/0
Building
configuration...
Current
configuration : 93 bytes
!
interface
FastEthernet0/0
ip address 10.1.1.2 255.255.255.0
duplex auto
speed auto
end
CE2#
PE2#show run
int fa0/0
Building
configuration...
Current
configuration : 128 bytes
!
interface
FastEthernet0/0
no ip address
duplex auto
speed auto
xconnect 3.3.3.3 1 encapsulation l2tpv3
pw-class TEST
end
à3.3.3.3 is the loopback0 of
PE1
PE2#
PE2#show run |
begin TEST
pseudowire-class
TEST
encapsulation l2tpv3
ip local interface Loopback0
!
CE1#show ip
route
Codes:
C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O -
OSPF, IA - OSPF inter area
N1
- OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF
external type 2
i - IS-IS, su - IS-IS summary, L1 -
IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate
default, U - per-user static route
o - ODR, P - periodic downloaded static
route
Gateway
of last resort is not set
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
10.0.0.0/24 is subnetted, 1 subnets
C 10.1.1.0 is directly connected,
FastEthernet0/0
11.0.0.0/32 is subnetted, 1 subnets
C 11.11.11.11 is directly connected,
Loopback1
CE1#
CE1#ping
10.1.1.1
Type
escape sequence to abort.
Sending
5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
!!!!!
Success
rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
CE1#
CE1#ping 10.1.1.2
Type
escape sequence to abort.
Sending
5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!
Success
rate is 100 percent (5/5), round-trip min/avg/max = 8/29/88 ms
CE1#
CE2#show ip
route
Codes:
C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O -
OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 -
OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF
external type 2
i - IS-IS, su - IS-IS summary, L1 -
IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate
default, U - per-user static route
o - ODR, P - periodic downloaded static
route
Gateway
of last resort is not set
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback0
22.0.0.0/32 is subnetted, 1 subnets
C 22.22.22.22 is directly connected,
Loopback1
10.0.0.0/24 is subnetted, 1 subnets
C 10.1.1.0 is directly connected,
FastEthernet0/0
CE2#
CE2#ping
10.1.1.2
Type
escape sequence to abort.
Sending
5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!
Success
rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
CE2#
CE2#ping 10.1.1.1
Type
escape sequence to abort.
Sending
5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
!!!!!
Success
rate is 100 percent (5/5), round-trip min/avg/max = 8/40/96 ms
CE2#
PE1#show l2tun
session
%No
active L2F tunnels
L2TP
Session Information Total tunnels 1 sessions 1
LocID RemID
TunID Username, Intf/ State
Last Chg Uniq ID
Vcid, Circuit
15639 53296
62903 1, Fa0/0 est 00:14:43 2
%No
active PPTP tunnels
PE1#
PE1#show l2tun
session all
%No
active L2F tunnels
L2TP
Session Information Total tunnels 1 sessions 1
Session
id 15639 is up, tunnel id 62903
Call
serial number is 4217400000
Remote
tunnel name is PE2
Internet address is 4.4.4.4
Session is L2TP signalled
Session state is established, time since
change 00:14:46
31 Packets sent, 32 received
7193 Bytes sent, 7270 received
Last clearing of "show vpdn"
counters never
Receive packets dropped:
out-of-order: 0
total: 0
Send packets dropped:
exceeded session MTU: 0
total: 0
Session vcid is 1
Session Layer 2 circuit, type is Ethernet,
name is FastEthernet0/0
Circuit state is UP
Remote session id is 53296, remote tunnel
id 14802
DF bit off, ToS reflect disabled, ToS value
0, TTL value 255
No session cookie information available
UDP checksums are disabled
SSS switching enabled
Sequencing is off
Unique ID is 2
%No
active PPTP tunnels
PE1#
PE2#show l2tun
session
%No
active L2F tunnels
L2TP
Session Information Total tunnels 1 sessions 1
LocID RemID
TunID Username, Intf/ State
Last Chg Uniq ID
Vcid, Circuit
53296 15639
14802 1, Fa0/0 est 00:15:17 1
%No
active PPTP tunnels
PE2#
PE2#show l2tun
session all
%No
active L2F tunnels
L2TP
Session Information Total tunnels 1 sessions 1
Session
id 53296 is up, tunnel id 14802
Call
serial number is 4217400000
Remote
tunnel name is PE1
Internet address is 3.3.3.3
Session is L2TP signalled
Session state is established, time since
change 00:15:20
33 Packets sent, 31 received
7634 Bytes sent, 7193 received
Last clearing of "show vpdn"
counters never
Receive packets dropped:
out-of-order: 0
total: 0
Send packets dropped:
exceeded session MTU: 0
total: 0
Session vcid is 1
Session Layer 2 circuit, type is Ethernet,
name is FastEthernet0/0
Circuit state is UP
Remote session id is 15639, remote tunnel
id 62903
DF bit off, ToS reflect disabled, ToS value
0, TTL value 255
No session cookie information available
UDP checksums are disabled
SSS switching enabled
Sequencing is off
Unique ID is 1
%No
active PPTP tunnels
PE2#
CE1#show cdp
neighbors
Capability
Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I -
IGMP, r - Repeater
Device
ID Local Intrfce Holdtme
Capability Platform Port ID
PE1 Fas 0/0 142 R
S I 3725 Fas 0/0
CE2 Fas 0/0 124 R S I 3725
Fas 0/0
CE1#
CE2#show cdp
neighbors
Capability
Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I -
IGMP, r - Repeater
Device
ID Local Intrfce Holdtme
Capability Platform Port ID
PE2 Fas 0/0 149 R S I 3725
Fas 0/0
CE1 Fas 0/0 172 R S I 3725
Fas 0/0
CE2#
PE1#show cdp
neighbors
Capability
Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I -
IGMP, r - Repeater
Device
ID Local Intrfce Holdtme
Capability Platform Port ID
PE2 Ser 1/1 170 R S I 3725
Ser 1/1
PE1#
PE2#show cdp
neighbors
Capability
Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I -
IGMP, r - Repeater
Device
ID Local Intrfce Holdtme
Capability Platform Port ID
PE1 Ser 1/1 165 R S I 3725
Ser 1/1
PE2#
CE1#ping
255.255.255.255
Type
escape sequence to abort.
Sending
5, 100-byte ICMP Echos to 255.255.255.255, timeout is 2 seconds:
Reply
to request 0 from 10.1.1.2, 92 ms
Reply
to request 1 from 10.1.1.2, 72 ms
Reply
to request 2 from 10.1.1.2, 92 ms
Reply
to request 3 from 10.1.1.2, 72 ms
Reply
to request 4 from 10.1.1.2, 72 ms
CE1#
CE2#ping
255.255.255.255
Type
escape sequence to abort.
Sending
5, 100-byte ICMP Echos to 255.255.255.255, timeout is 2 seconds:
Reply
to request 0 from 10.1.1.1, 68 ms
Reply
to request 1 from 10.1.1.1, 56 ms
Reply
to request 2 from 10.1.1.1, 68 ms
Reply
to request 3 from 10.1.1.1, 44 ms
Reply
to request 4 from 10.1.1.1, 80 ms
CE2#
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