[c-nsp] 802.1ad S-TAG - 88a8

[Aaron]

Thanks Quinn, the following config seems to result in 8100 over 8100 (which I understand to be ctag over ctag in its truest sense).    I’m looking to make the outer (top) tag be a true S-TAG, which should have ethertype of 88A8.

 

eng-lab-3600-2#sh ethernet service instance id 1 interface g0/1 detail | in Encap

Encapsulation: dot1q 2902 vlan protocol type 0x8100 second-dot1q 100 vlan protocol type 0x8100

 

 

eng-lab-3600-2#

eng-lab-3600-2#conf t

Enter configuration commands, one per line.  End with CNTL/Z.

eng-lab-3600-2(config)#int g0/1

eng-lab-3600-2(config-if)#service instance 1 ethernet

eng-lab-3600-2(config-if-srv)# encapsulation dot1q ?

  <1-4094>  VLAN id

  any       For all VLANS [1-4094]

 

eng-lab-3600-2(config-if-srv)# encapsulation ?

  default          catch-all unconfigured encapsulation

  dot1q            IEEE 802.1Q Virtual LAN or S-VLAN

  priority-tagged  Priority tagged EFP

  untagged         Untagged encapsulation

 

eng-lab-3600-2(config-if-srv)# encapsulation do

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 ?

  ,             comma

  -             hyphen

  cos           cos Vlan

  etype         payload ethertype after Vlan Field

  second-dot1q  inner 802.1Q Virtual LAN or C-VLAN

  <cr>

 

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 e

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 etype ?

  ipv4             IPv4

  ipv6             IPv6

  pppoe-all        PPPoE ALL

  pppoe-discovery  PPPoE Discovery Stage

  pppoe-session    PPPoE Session Stage

 

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 etype ip

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 etype ipv?

ipv4  ipv6

 

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 etype ipv4 ?

  ,  comma

  <cr>

 

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 se

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 second-dot1q ?

  <1-4094>  VLAN id

  any       For all VLANS [1-4094]

 

eng-lab-3600-2(config-if-srv)# encapsulation dot1q 2902 second-dot1q 100 ?

  ,      comma

  -      hyphen

  cos    cos Vlan

  etype  payload ethertype after Vlan Field

  <cr>

 

eng-lab-3600-2(config-if-srv)#

 

 

 

 

 

From: quinn snyder [mailto:snyderq at gmail.com] 
Sent: Thursday, May 21, 2015 12:58 PM
To: Aaron
Subject: Re: [c-nsp] 802.1ad S-TAG - 88a8

 

isn’t there an option — rather than ‘encap dot1q’ — that can be an ‘encap dot1ad’ or so in the config?

 

i don’t have access to my me’s at the moment — but i vaguely remember something of the sort present in there somewhere.

 

q.

--
quinn snyder
snyderq at gmail.com



 

On May 21, 2015, at 06:42, Aaron <aaron1 at gvtc.com> wrote:

 

Does anyone know how to make an ME3600 service instance (efp) tag frames
with 802.1ad s-tagging (88a8 ethertype) instead of the typical 802.1q C-tag
(8100) ?



I see the way I have this config'd it shows that both tags are 8100
ethertype which I think is technically known as c-tag (8100).  So I guess
you would call this ctag-in-ctag



But how would I make the outer tag a TRUE provider tag (aka s-tag, aka 88a8
ethertype)  and leave the inner (bottom customer tag) remain 8100?





eng-lab-3600-2#sh run in g0/1

interface GigabitEthernet0/1

switchport trunk allowed vlan none

switchport mode trunk

mtu 9202

service instance 1 ethernet

 encapsulation dot1q 2902 second-dot1q 100

 rewrite ingress tag pop 2 symmetric

 l2protocol tunnel

 xconnect 10.101.0.254 10000 encapsulation mpls

  mtu 1500

!





eng-lab-3600-2#sh ethernet service instance id 1 interface g0/1 detail

Service Instance ID: 1

Service Instance Type: static

Associated Interface: GigabitEthernet0/1

Associated EVC:

L2protocol tunnel

CE-Vlans:

Encapsulation: dot1q 2902 vlan protocol type 0x8100 second-dot1q 100 vlan
protocol type 0x8100

Rewrite: ingress tag pop 2 symmetric

Interface Dot1q Tunnel Ethertype: 0x8100

State: Up

EFP Statistics:

  Pkts In   Bytes In   Pkts Out  Bytes Out

   112109   16810234     105959   17741577







Aaron

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