Switching

Hi.

Consider an L2 provider topology using EX switches as follows.

CE-1 -----------------  EX-1 ---- EX-2---- EX-3 ----------------- CE-2 

EX-1 is a provider edge bridge and so adds a customer-specific S-tag to the frames coming in from CE-1. To do this, EX-1 needs to be configured in the service provider style, not the enterprise style. Same with the other provider edge bridge EX-2.

My question is about the provider bridge switch EX-2. I know that it is configured with only the S-VLAN, but do we configure it in the enterprise style, or service provider style?

Thanks,

Deepak

Hi.

Consider an L2 provider topology using EX switches as follows.

CE-1 -----------------  EX-1 ---- EX-2---- EX-3 ----------------- CE-2 

EX-1 is a provider edge bridge and so adds a customer-specific S-tag to the frames coming in from CE-1. To do this, EX-1 needs to be configured in the service provider style, not the enterprise style. Same with the other provider edge bridge EX-2.

My question is about the provider bridge switch EX-2. I know that it is configured with only the S-VLAN, but do we configure it in the enterprise style, or service provider style?

Thanks,

Deepak

Hi, 

My provider-style configuration on EX. 

EX4300-1> show configuration interfaces ge-1/0/8 
description "UNI: Customer1";
flexible-vlan-tagging;
native-vlan-id 206;
encapsulation extended-vlan-bridge;
unit 0 {
    vlan-id 206;
}

EX4300-1> show configuration interfaces ae0 | display inheritance no-comments        
description "TRUNK";
flexible-vlan-tagging;
mtu 9216;
hold-time up 1000 down 0;
encapsulation extended-vlan-bridge;
aggregated-ether-options {
    no-flow-control;
    minimum-links 1;
    link-speed 10g;
    lacp {
        active;
        periodic fast;
    }
}
unit 206 {
    description "Customer1";
    vlan-id 206;
}

EX4300-1> show configuration vlans SVLAN206
interface ae0.206;
interface ge-1/0/8.0;

My config for Q-in-Q transparency:

EX4300-1> show configuration interfaces ge-0/0/2                     
description "UNI: q-in-q test s2-s1-s3 vlan ";
flexible-vlan-tagging; - mandatory statement 
native-vlan-id 302;     - mandatory statement S-Tag
mtu 9216; - maximum sized, should be set to 9100
encapsulation extended-vlan-bridge; - mandatory statement
unit 0 {
    vlan-id-list 1-4094; - allowed C-VLAN numbers 
    input-vlan-map push; - mandatory statement in case of vlan-id-list
    output-vlan-map pop; - mandatory statement in case of vlan-id-list
}

Frames passed:

up to 9100 bytes;

untagged/tagged/double-tagged/priority tagged packets with VLAN ID set to 0;

802.1q CoS bits passed unchanged in any (first and second) client tags. 

Added "no-mac-learning".

EX4300-1> show configuration vlans SVLAN302 
interface ae0.302;
interface ge-0/0/2.0;
switch-options {
    no-mac-learning;
}

Added transparency L2CP.

EX4300-1> show configuration protocols layer2-control mac-rewrite   

interface ge-0/0/2 {

    protocol {

        stp;

        vtp;

        cdp;

        ieee8021x;

        ieee8023ah;

        elmi;

        lacp;

        lldp;

        mmrp;

        mvrp;

        gvrp;

        vstp;

        udld;

    }

}

EX4300-1> show configuration protocols rstp                          
bridge-priority 16k;
interface ge-0/0/2 {
    disable;
}
interface all;

EX4300-1> show configuration protocols layer2-control  bpdu-block   
    interface ge-0/0/0;
             - ge-0/0/2 absent 
    interface ge-0/0/1;
    interface ge-0/0/3;
    interface ge-0/0/4;
    interface ge-0/0/6;
    interface ge-0/0/7;
    interface ge-0/0/8;
    interface ge-0/0/9;
    interface ge-0/0/10;

Tested L2CP transparency between two Cisco switches. CDP, VTP, PVSTP/PVSTP+, MSTP, LACP are passed OK. Mac-rewrite statement is configured on the edge ports and uplinks with routers. Trunks between switches do not have the statement.

Hi.

Consider an L2 provider topology using EX switches as follows.

CE-1 -----------------  EX-1 ---- EX-2---- EX-3 ----------------- CE-2 

EX-1 is a provider edge bridge and so adds a customer-specific S-tag to the frames coming in from CE-1. To do this, EX-1 needs to be configured in the service provider style, not the enterprise style. Same with the other provider edge bridge EX-2.

My question is about the provider bridge switch EX-2. I know that it is configured with only the S-VLAN, but do we configure it in the enterprise style, or service provider style?

Thanks,

Deepak