Ethernet over MPLS query about connecting cusomers

[Asemmoqbel]

Dear Beloved engineers,

direct to my question without longer intro, I'm trying to establish a l2vpn between customer sites via Etherent over mpls. we want to connect the customer A site with vlan tagged and customer B site with untagged vlan.

We tried to configure one side with vc type 4 using vlan mode and other side with type 5 etherent type but VC never comes up. I did a research on cisco threads and i found this note qutoed as below

(

• For a particular EoMPLS connection, both the ingress EoMPLS interface on the ingress PE and the egress EoMPLS interface on the egress PE have to be subinterfaces with dot1Q encapsulation or neither is a subinterface.)

is that means we can't mix connection VC between type 4 and type 5. if no, can you please provide other alternatives to meet our needs.

Thanks in advanced.

[Francesco Molino]

Hi

In order to show you the config, I've done a quick design that looks like yours:

On CE1:

!
interface Ethernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
duplex auto
no cdp enable
end

CE1(config-if)#do sh run int e0/0
Building configuration...

Current configuration : 93 bytes
!
interface Ethernet0/0
switchport access vlan 10
switchport mode access
duplex auto
end

On CE2:

!
interface Ethernet0/1
switchport access vlan 10
switchport mode access
duplex auto
no cdp enable
spanning-tree portfast
end

CE2#sh run int e0/0
Building configuration...

Current configuration : 93 bytes
!
interface Ethernet0/0
switchport access vlan 10
switchport mode access
duplex auto
end

On R1:

R1#sh run int e0/0
Building configuration...

Current configuration : 44 bytes
!
interface Ethernet0/0
no ip address
end

R1#sh run int e0/0.10
Building configuration...

Current configuration : 109 bytes
!
interface Ethernet0/0.10
encapsulation dot1Q 10
xconnect 3.3.3.3 1 encapsulation mpls pw-class MPLS
end

R1#sh run | sec pseudo
pseudowire-class MPLS
encapsulation mpls

R1#sh ip int bri | ex unas
Interface IP-Address OK? Method Status Protocol
Ethernet0/1 10.2.0.1 YES manual up up
Loopback0 1.1.1.1 YES manual up up

R1#sh mpls ldp bindings
lib entry: 1.1.1.1/32, rev 2
local binding: label: imp-null
remote binding: lsr: 2.2.2.2:0, label: 17
remote binding: lsr: 3.3.3.3:0, label: 18
lib entry: 2.2.2.2/32, rev 4
local binding: label: 16
remote binding: lsr: 2.2.2.2:0, label: imp-null
remote binding: lsr: 3.3.3.3:0, label: 16
lib entry: 3.3.3.3/32, rev 6
local binding: label: 17
remote binding: lsr: 2.2.2.2:0, label: 16
remote binding: lsr: 3.3.3.3:0, label: imp-null
lib entry: 10.2.0.0/24, rev 8
local binding: label: imp-null
remote binding: lsr: 2.2.2.2:0, label: imp-null
remote binding: lsr: 3.3.3.3:0, label: 17
lib entry: 10.2.1.0/24, rev 10
local binding: label: 18
remote binding: lsr: 2.2.2.2:0, label: imp-null
remote binding: lsr: 3.3.3.3:0, label: imp-null

R1#sh mpls l2transport vc

Local intf Local circuit Dest address VC ID Status
------------- -------------------------- --------------- ---------- ----------
Et0/0.10 Eth VLAN 10 3.3.3.3 1 UP

R1#

On R2:

R2#sh run int e0/0
Building configuration...

Current configuration : 97 bytes
!
interface Ethernet0/0
no ip address
xconnect 1.1.1.1 1 encapsulation mpls pw-class MPLS
end

R2#sh ip int bri | ex unas
Interface IP-Address OK? Method Status Protocol
Ethernet0/1 10.2.1.3 YES manual up up
Loopback0 3.3.3.3 YES manual up up

R2#sh run | sec pseudo
pseudowire-class MPLS
encapsulation mpls

R2#sh mpls ldp bindings
lib entry: 1.1.1.1/32, rev 10
local binding: label: 18
remote binding: lsr: 2.2.2.2:0, label: 17
remote binding: lsr: 1.1.1.1:0, label: imp-null
lib entry: 2.2.2.2/32, rev 2
local binding: label: 16
remote binding: lsr: 2.2.2.2:0, label: imp-null
remote binding: lsr: 1.1.1.1:0, label: 16
lib entry: 3.3.3.3/32, rev 4
local binding: label: imp-null
remote binding: lsr: 2.2.2.2:0, label: 16
remote binding: lsr: 1.1.1.1:0, label: 17
lib entry: 10.2.0.0/24, rev 6
local binding: label: 17
remote binding: lsr: 2.2.2.2:0, label: imp-null
remote binding: lsr: 1.1.1.1:0, label: imp-null
lib entry: 10.2.1.0/24, rev 8
local binding: label: imp-null
remote binding: lsr: 2.2.2.2:0, label: imp-null
remote binding: lsr: 1.1.1.1:0, label: 18

R2#sh mpls l2transport vc

Local intf Local circuit Dest address VC ID Status
------------- -------------------------- --------------- ---------- ----------
Et0/0 Ethernet 1.1.1.1 1 UP

R2#

As you can see both side have established connection negotiating vc type Ethernet:

On R1:

R1#sh mpls l2transport binding
Destination Address: 3.3.3.3,VC ID: 1
Local Label: 20
Cbit: 1, VC Type: Ethernet, GroupID: 0
MTU: 1500, Interface Desc: n/a
VCCV: CC Type: CW [1], RA [2]
CV Type: LSPV [2]
Remote Label: 22
Cbit: 1, VC Type: Ethernet, GroupID: 0
MTU: 1500, Interface Desc: n/a
VCCV: CC Type: CW [1], RA [2]
CV Type: LSPV [2]

R1#

On R2:

R2#sh mpls l2transport binding
Destination Address: 1.1.1.1,VC ID: 1
Local Label: 22
Cbit: 1, VC Type: Ethernet, GroupID: 0
MTU: 1500, Interface Desc: n/a
VCCV: CC Type: CW [1], RA [2]
CV Type: LSPV [2]
Remote Label: 20
Cbit: 1, VC Type: Ethernet, GroupID: 0
MTU: 1500, Interface Desc: n/a
VCCV: CC Type: CW [1], RA [2]
CV Type: LSPV [2]

I tried to reproduce your design by setuping 1 side using trunk and subinterface and on the other a simple access port without subinterfaces (untagged).

Is that what you tried to achieve?

Thanks

[Asemmoqbel]

Dear Francesco,

I tried to do the same as you did but it didn't work. 

The VC shows down as below

Local intf Local circuit Dest address VC ID Status
------------- -------------------------- --------------- ---------- ----------
Fa2/0.50 Eth VLAN 50 3.3.3.3 1 DOWN

Let's focuse on R1 and R2 configuration because CE doesn't play a role in esatblishing L2 vpn mpls circuit.

In R1, there is a vlan and subinterface configured and in R2, etherenet access port without vlan. this is exactly what I want but I keep trying no sucess even though the configuration doesn't seem much complex.

I noticed you configured Psudowire class which only establish virtual point to point connection and encapsulating Mpls packets. I guess using xconnect to create VC and encapsutalting mpls packets enough.

I'm looking forward to hear positive feed back from you,,

Thanks

[smailmilak]

Hi,

Please provide the detailed show vc output.

[Asemmoqbel]

I will list below configuration for PE1 and PE2. 

PE1 configuration

PE1#sh run
Building configuration...

Current configuration : 1926 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname PE1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
mpls label protocol ldp
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
ip tcp synwait-time 5
pseudowire-class mpls
encapsulation mpls
!
!
!
!
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.10
encapsulation dot1Q 10
xconnect 3.3.3.3 10 encapsulation mpls
!
interface FastEthernet0/0.20
encapsulation dot1Q 20
xconnect 3.3.3.3 20 encapsulation mpls
!
interface FastEthernet0/0.30
encapsulation dot1Q 30
xconnect 3.3.3.3 30 encapsulation mpls
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial1/0
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/1
ip address 192.168.1.1 255.255.255.0
mpls ip
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface FastEthernet2/0
no ip address
duplex auto
speed auto
xconnect 3.3.3.3 1 encapsulation mpls pw-class mpls
!
router ospf 1
router-id 1.1.1.1
log-adjacency-changes
network 1.1.1.1 0.0.0.0 area 0
network 192.168.1.0 0.0.0.255 area 0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
!
mpls ldp router-id Loopback0
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end

PE1#sh mpls l2transport vc

Local intf Local circuit Dest address VC ID Status
------------- -------------------------- --------------- ---------- ----------
Fa2/0 Ethernet 3.3.3.3 1 DOWN
Fa0/0.10 Eth VLAN 10 3.3.3.3 10 UP
Fa0/0.20 Eth VLAN 20 3.3.3.3 20 UP
Fa0/0.30 Eth VLAN 30 3.3.3.3 30 UP
PE1#

PE2 Configuration

PE2#sh run
Building configuration...

Current configuration : 1981 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname PE2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
mpls label protocol ldp
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
log config
hidekeys
!
!
!
!
ip tcp synwait-time 5
pseudowire-class mpls
encapsulation mpls
!
!
!
!
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.10
encapsulation dot1Q 10
xconnect 1.1.1.1 10 encapsulation mpls
!
interface FastEthernet0/0.20
encapsulation dot1Q 20
xconnect 1.1.1.1 20 encapsulation mpls
!
interface FastEthernet0/0.30
encapsulation dot1Q 30
xconnect 1.1.1.1 30 encapsulation mpls
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial1/0
ip address 192.168.2.1 255.255.255.0
mpls ip
serial restart-delay 0
!
interface Serial1/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial1/3
no ip address
shutdown
serial restart-delay 0
!
interface FastEthernet2/0
no ip address
duplex auto
speed auto
!
interface FastEthernet2/0.50
encapsulation dot1Q 50
xconnect 1.1.1.1 1 encapsulation mpls pw-class mpls
!
router ospf 1
router-id 3.3.3.3
log-adjacency-changes
network 3.3.3.3 0.0.0.0 area 0
network 192.168.2.0 0.0.0.255 area 0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
!
mpls ldp router-id Loopback0
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
exec-timeout 0 0
privilege level 15
logging synchronous
line aux 0
exec-timeout 0 0
privilege level 15
logging synchronous
line vty 0 4
login
!
!
end

PE2#sh mpls l2transport vc

Local intf Local circuit Dest address VC ID Status
------------- -------------------------- --------------- ---------- ----------
Fa2/0.50 Eth VLAN 50 1.1.1.1 1 DOWN
Fa0/0.10 Eth VLAN 10 1.1.1.1 10 UP
Fa0/0.20 Eth VLAN 20 1.1.1.1 20 UP
Fa0/0.30 Eth VLAN 30 1.1.1.1 30 UP
PE2#

[smailmilak]

Please provide sh mpls l2transport vc 1 detail

Detail part is important

[Asemmoqbel]

PE1#sh mpls l2transport vc detail
Local interface: Fa2/0 up, line protocol up, Ethernet up
Destination address: 3.3.3.3, VC ID: 1, VC status: down
Create time: 00:34:37, last status change time: 00:33:45
Signaling protocol: LDP, peer 3.3.3.3:0 up
MPLS VC labels: local 22, remote 22
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

Local interface: Fa0/0.10 up, line protocol up, Eth VLAN 10 up
Destination address: 3.3.3.3, VC ID: 10, VC status: up
Next hop: point2point
Output interface: Se1/1, imposed label stack {16 17}
Create time: 00:37:31, last status change time: 00:37:06
Signaling protocol: LDP, peer 3.3.3.3:0 up
MPLS VC labels: local 16, remote 17
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

Local interface: Fa0/0.20 up, line protocol up, Eth VLAN 20 up
Destination address: 3.3.3.3, VC ID: 20, VC status: up
Next hop: point2point
Output interface: Se1/1, imposed label stack {16 16}
Create time: 00:38:29, last status change time: 00:38:04
Signaling protocol: LDP, peer 3.3.3.3:0 up
MPLS VC labels: local 17, remote 16
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

Local interface: Fa0/0.30 up, line protocol up, Eth VLAN 30 up
Destination address: 3.3.3.3, VC ID: 30, VC status: up
Next hop: point2point
Output interface: Se1/1, imposed label stack {16 18}
Create time: 00:38:33, last status change time: 00:38:08
Signaling protocol: LDP, peer 3.3.3.3:0 up
MPLS VC labels: local 18, remote 18
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

PE1#

PE2#sh mpls l2transport vc detail
Local interface: Fa2/0.50 up, line protocol up, Eth VLAN 50 up
Destination address: 1.1.1.1, VC ID: 1, VC status: down
Create time: 00:39:17, last status change time: 00:39:17
Signaling protocol: LDP, peer 1.1.1.1:0 up
MPLS VC labels: local 22, remote 22
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

Local interface: Fa0/0.10 up, line protocol up, Eth VLAN 10 up
Destination address: 1.1.1.1, VC ID: 10, VC status: up
Next hop: point2point
Output interface: Se1/0, imposed label stack {17 16}
Create time: 00:43:01, last status change time: 00:42:37
Signaling protocol: LDP, peer 1.1.1.1:0 up
MPLS VC labels: local 17, remote 16
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

Local interface: Fa0/0.20 up, line protocol up, Eth VLAN 20 up
Destination address: 1.1.1.1, VC ID: 20, VC status: up
Next hop: point2point
Output interface: Se1/0, imposed label stack {17 17}
Create time: 00:43:11, last status change time: 00:42:48
Signaling protocol: LDP, peer 1.1.1.1:0 up
MPLS VC labels: local 16, remote 17
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

Local interface: Fa0/0.30 up, line protocol up, Eth VLAN 30 up
Destination address: 1.1.1.1, VC ID: 30, VC status: up
Next hop: point2point
Output interface: Se1/0, imposed label stack {17 18}
Create time: 00:43:11, last status change time: 00:42:48
Signaling protocol: LDP, peer 1.1.1.1:0 up
MPLS VC labels: local 18, remote 18
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

PE2#

[Francesco Molino]

Can you share the output of show spanning-tree on both router?

[Asemmoqbel]

hi, Francesco

There is no spanning-tree protocol configured on the PE routers because they are not L3 switches as well as there is no vlan configured.

I am still thinking how could bring the vc up between different type 4 and type 5 EoMPLS.

[Francesco Molino]

Sorry I wasn't talking about PE but more about CE. There're switch right?

Can you run, this time on PE, the following commands:

debug mpls l2transport signaling message detail
debug mpls l2transport vc status
debug mpls l2transport vc status event
debug mpls l2transport vc event
debug mpls l2transport vc ldp
sh mpls l2transport vc detail

[Asemmoqbel]

I ran all debug commands but nothing showed up.

here is the output of sh mpls l2transport vc detail

PE1#sh mpls l2transport vc 1 detail
Local interface: Fa2/0 up, line protocol up, Ethernet up
Destination address: 3.3.3.3, VC ID: 1, VC status: down
Create time: 02:50:53, last status change time: 02:50:01
Signaling protocol: LDP, peer 3.3.3.3:0 up
MPLS VC labels: local 22, remote 22
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

PE1#PE1#sh mpls l2transport vc 1 detail


PE2#sh mpls l2transport vc 1 detail
Local interface: Fa2/0.50 up, line protocol up, Eth VLAN 50 up
Destination address: 1.1.1.1, VC ID: 1, VC status: down
Create time: 02:49:45, last status change time: 02:49:45
Signaling protocol: LDP, peer 1.1.1.1:0 up
MPLS VC labels: local 22, remote 22
Group ID: local 0, remote 0
MTU: local 1500, remote 1500
Remote interface description:
Sequencing: receive disabled, send disabled
VC statistics:
packet totals: receive 0, send 0
byte totals: receive 0, send 0
packet drops: receive 0, seq error 0, send 0

PE2#

[Francesco Molino]

Did you do a shut/no shut after activating debugs?

Can you run the following commands:
sh mpls l2transport pwid
sh mpls l2transport binding
sh mpls l2transport vc event-trace
sh mpls l2transport vc ssm id

Please put all outputs in a text file

[Asemmoqbel]

heey

I tried to do some of your given commands but not found on the list maybe it's not in gns3 virtual routers. Anyway I listed what i could in txt file, please take a look.

By the way, I found something intersting when I enabled debuging mpls l2tran vc event

*Mar 1 00:10:08.271: AToM MGR [3.3.3.3, 1]: Local end up
*Mar 1 00:10:08.275: AToM MGR [3.3.3.3, 1]: Mismatch vc type in remote label binding, local 5, remote 4
*Mar 1 00:10:08.279: AToM MGR [3.3.3.3, 1]: Invalidate vc, deactivating data plane
*Mar 1 00:10:08.291: AToM LDP [3.3.3.3]: Sending label mapping msg
vc type 5, cbit 1, vc id 1, group id 0, vc label 19, status 0, mtu 1500

this output showed when I typed debug mpls l2transport vc event, if you check above it states there mismatch vc type. I believe this is the issue. but wait a minute how it worked with you !!

[Francesco Molino · Accepted solution]

Hey.

Yes I've tested it on Virl and GNS3 as I don't have 2 physical routers right now to build it up.

Can you configure a pseudowire and forcing the type as ethernet like:

pseudowire-class TEST
encapsulation mpls
interworking ethernet

and then apply it to the xconnect ?

thanks

[Asemmoqbel]

yes bingooooo. it worked!!

only one thing I need to understand now. traffic coming to the ingress of PE2 will be tagged with vlan 50, then how it will know to go to PE1 since it's untagged. can you just tell how the frame will be transmitted from CE1 to CE2. there is a litte confusion in here.

Thanks Deeply.