L2 MPLS VPN interworking

[kelleung]

According to Cisco document. I'm wondering why Cisco GSR series couldn't support ATM VP and port mode interworking. Is it a limitation of the technology/standard itself or simply the s/w or h/w issue of GSR router ?

http://www.cisco.com/en/US/customer/products/sw/iosswrel/ps1829/products_feature_guide09186a00801b2407.html

[bjornarsb]

Hi,

It's a line card hardware limitation.

BR,

Bjornarsb

[Rahul Kachalia]

I assume you are referring to following statement:

"Cisco 12000 series Engine 5 line cards do not support L2VPN interworking on ATM. On other line cards and platforms, only ATM AAL5 VC mode is supported; ATM VP and port mode are not supported."

L2VPN supports 2 types of Interworking, Ethernet and IP. If there is an ATM link type between PE and CE, only bridged or routed AAL5 is supported for all the platforms.

In ATMoMPLS VP traffic is transported over pw when matching VPI in an ATM header is seen from CE regardless of VCI values (excluding reserved VCI's) Similarly in ATMoMPLS Port mode ATM traffic is transported over pw regardless VPI and VCI value set by CE.

Neither in ATMoMPLS VP or Port Mode PE peeks into beyond ATM header so it has no knowledge of upper layer, hence no Ethernet or IP Interworking is not possible. It remains true in Local Switching Interworking scenarios too...

thanks,

rahul.

[senthil1976]

I think, it is the limitation of ATM line cards in GSR. Ip interworking is possible with ATM to transport over MPLS.

Sen...

[Rahul Kachalia]

Sen,

Yes, Ethernet and IP Interworking in ATM is supported on GSR Linecards but only when ATM VC is configured AAL5 mode. It is not supported in VP or Port Mode, which I believe the original question is...

thanks,

rahul.

[atif-siddiqui]

Hi,

I am trying to configure local ethernet switching, it is not working, is it supported, not enough documentation is avaliable on the cisco website.

connect cust GigabitEthernet1/1/0.3600 GigabitEthernet1/1/2.3700

Router1 is a GSR, E5 Card.

router1#sh connection

ID Name Segment 1 Segment 2 State Description

============================================================================================

1 cut Gi1/1/0.3600 Gi1/1/2.3700 UP

the other side routers cannot ping across.

router1#sh run interface gig

router1#sh run interface gigabitEthernet 1/1/2.3700

Building configuration...

Current configuration : 95 bytes

!

interface GigabitEthernet1/1/2.3700

encapsulation dot1Q 3700

no ip directed-broadcast

end

interface GigabitEthernet1/1/0.3600

encapsulation dot1Q 3610

no ip directed-broadcast

end

What else is required. Other routers connected have IP addresses on each side.

Ce1 and Ce2 are 7606.

CE1#sh run interface gigabitEthernet 6/2.3600

interface GigabitEthernet6/2.3600

encapsulation dot1Q 3610

ip address 10.1.1.2 255.255.255.252

end

CE2:

interface GigabitEthernet6/2.3700

encapsulation dot1Q 3700

ip address 10.1.1.1 255.255.255.252

end

Here is some infomration:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1829/products_feature_guide09186a00801ea88d.html#wp1132065

[Harold Ritter]

Atif,

L2 Local Switching is supported on the Engine 5 starting with 12.0(32)S.

What level of code do you use?

Hope this helps,

[atif-siddiqui]

Hi Harold,

Is it supported on 7606? running 12.0(33)SRB

and GSR have E5 cards gige, with 12.0(32)SY.

I just don't know what I m missing. It would not ping across.

appereciate your help here.

Atif

[swaroop.potdar]

7600: Only Vlan based local Layer 2 switching is supported with the restriction that you configure the Eompls on an SVI, for which you will need an Enhanced FlexWan or OSM interface facing the core. (This support is there in 12.2SX and SR)

12000: As Harold pointed it is supported from 12.0 (32)S. With Engine 5 interfaces facing the customer.

You configuration looks clean, although one thought, have you tried the VLAN same-port switching as well.

Is the result same for that too.

HTH-Cheers,

Swaroop

[atif-siddiqui]

Hi Swaroop,

so what is meant by EoMPLS on an SVI, beacuse this is a local switching. can you clarify more. Here is a diagram for this setup:

CE----PE------CE, we want to switch locally so that CE can ping other CE.

7606 CE's are using this card:

Ce1#sh module 6

Mod Ports Card Type Model Serial No.

--- ----- -------------------------------------- ------------------ -----------

6 9 Supervisor Engine 32 8GE (Hot) WS-SUP32-GE-3B SAL1110JPYB

Mod MAC addresses Hw Fw Sw Status

--- ---------------------------------- ------ ------------ ------------ -------

6 0019.aa5a.3b06 to 0019.aa5a.3b11 4.5 12.2(18r)SX2 12.2(33)SRB Ok

Mod Sub-Module Model Serial Hw Status

---- --------------------------- ------------------ ----------- ------- -------

6 Policy Feature Card 3 WS-F6K-PFC3B SAL1109JGHM 2.3 Ok

6 Cat6k MSFC 2A daughterboard WS-F6K-MSFC2A SAL1107H4PN 4.0 Ok

Mod Online Diag Status

---- -------------------

6 Pass

PE using this card:

L3 Engine: 5 - ISE 10 Gbps

[Harold Ritter]

In the scenario you are testing, the 7600 do not need to support L2 Local Switching at all as they just act as CEs. The GSR does everything.

Regards,

[atif-siddiqui]

ok agreed. previously I used the 7600 as a local switching point, and it did not work either. So was wondering the HW I have on 7600 will support or not.

tx

Atif

[atif-siddiqui]

here is another setup: where 7606 is switching ethernet locally.

CE(3550)f0/12 <-----> gig1/36 (PE2)7606 6/2.3600 <----> 1/1/0.3600(GW) GSR

CE2#sh ver

Cisco IOS Software, C3550 Software (C3550-IPSERVICESK9-M), Version 12.2(25)SEE2, RELEASE SOFTWARE (fc1)

CE2#sh run interface fastEthernet 0/12

Building configuration...

Current configuration : 104 bytes

!

interface FastEthernet0/12

no switchport

ip address 192.168.200.2 255.255.255.252

duplex full

end

PE:

PE2#sh ver

Cisco IOS Software, c7600s3223_rp Software (c7600s3223_rp-ADVIPSERVICESK9-M), Version 12.2(33)SRB, RELEASE SOFTWARE (fc6)

cisco CISCO7606 (R7000) processor (revision 1.0) with 458752K/65536K bytes of memory.

Processor board ID FOX11040T3D

R7000 CPU at 300Mhz, Implementation 0x27, Rev 3.3, 256KB L2, 1024KB L3 Cache

Last reset from power-on

1 SIP-400 controller (2 GigabitEthernet).

5 Virtual Ethernet interfaces

76 Gigabit Ethernet interfaces

1915K bytes of non-volatile configuration memory.

PE2#sh connection

ID Name Segment 1 Segment 2 State

================================================================================

9 eth_vlan_sw Gi1/36 Gi6/2.3600 UP

PE2#sh run interface gigabitEthernet 1/36

Building configuration...

Current configuration : 76 bytes

!

interface GigabitEthernet1/36

no ip address

speed 100

duplex full

end

PE2#sh run interface gigabitEthernet 6/2.3600

Building configuration...

Current configuration : 67 bytes

!

interface GigabitEthernet6/2.3600

encapsulation dot1Q 3700

end

GW:

GW#sh run int GigabitEthernet1/1/0.3600

Building configuration...

Current configuration : 146 bytes

!

interface GigabitEthernet1/1/0.3600

encapsulation dot1Q 3700

ip address 192.168.200.1 255.255.255.252

no ip directed-broadcast

end

GW#ping 192.168.200.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.200.2, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

.

[atif-siddiqui]

If I use Feature Navigator to look for:

Layer 2 Local Switching: Ethernet to VLAN feature.

These platforms shows up:

3845

7200

IAD2801

IOS:

12.4XJ

12.4T

is this output from feature navigator valid? on the other side documentation do mention 7606 and GSR.

Comments?

[Harold Ritter]

Atif,

L2 Local switching is not supported natively on the PFC3b and requires extra hardware such as the SIP-400 or the ES20.

Hope this helps,