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Questions tagged [qinq]

For questions about Q-in-Q Tunneling, where Q-in-Q tunneling and VLAN translation allow service providers to create a Layer 2 Ethernet connection between two customer sites. For instance, you want to isolate customer traffic within a single site or to enable customer traffic flows between cloud data centers in different geographic locations.

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1answer
24 views

Juniper EX4500 selective q-in-q

This switch supports selective qinq? For example I got 3 vlans on client port: 100, 200, 300. I need to add second tag on vlans 100, 200 but vlan 300 must run as is, without adding second tag. Is it ...
4
votes
1answer
97 views

Juniper EX4200 QinQ question

newbie here with a very similar question to one that was posted a couple of years back ... only slightly different (so, as the original question was asked so perfectly, I've copied it nearly verbatim ...
4
votes
2answers
409 views

VLAN Bandwidth Issues?

So here is my question. I helped to create this network for a client utilizing a trunked VLAN (QinQ) that connects into a Hybrid L2/L3 port. The client is concerned that VLANs will be bandwidth ...
3
votes
2answers
205 views

Metro Ethernet and Q-in-Q: does customer's switch need to support it?

We're looking at getting a LAN extension for a branch office; we'd like head office VLANs to be present at this new location. Local telco says they can do Q-in-Q, but I don't believe our current ...
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3answers
2k views

Cisco QinQ - More than one provider vlan (s-vlan) on dot1q-tunnel port

When we configure a qinq tunneling, the port, which performs the encapsulation, has the next command-lines: interface g0/10 switchport switchport mode dot1q-tunnel switchport access vlan xxx &...
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vote
1answer
291 views

Arista 7050s Loopback Q-in-Q

Debugging an issue where I'm trying to get q-in-q working on an Arista 7050S with a loopback. I’ve got packets egressing the switch double tagged but in ingress, I can see them on the STAG’s SVI. I’...
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1answer
1k views

QinQ and selective QinQ

What is difference between QinQ and selective QinQ ? We need to configure selective QinQ VLAN trunk between our setup. Please help in selective QinQ .
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1answer
605 views

Cisco, No dot1q tunnel mode on switchport

The problem is: I can not find a QinQ(a.k.a. double vlan tagging or dot1q tunnel) feature in the following cisco switch: WS-C4510R+E, SUP8-E with WS-X4748-UPOE+E line card installed. The Cisco ...
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0answers
503 views

Juniper EX3300 and Q-in-Q

I have a Juniper EX3300 switch that has a 10Gbps connection to our upstream provider. Our upstream provider (lets call them Provider A) passes us various connections on tagged VLANs over this single ...
1
vote
1answer
1k views

Bridge two QinQ interfaces on a juniper router

On a Juniper MX router I've got 2 interfaces that I need to bridge together. Interface A has QinQ configured: vlan-tags outer 0x8100.1 inner 0x8100.600 Interfaces B has QinQ configured vlan-tags ...
3
votes
1answer
877 views

Juniper EX4200 How to read SNMP traffic counters for specific VLAN id from trunk interface?

I have multiple q-in-q S-VLANs assigned to the trunk port ge-0/0/0. How can I read SNMP traffic counters for a specific VLAN id (S-VLAN) on that trunk port? Hardware is Juniper EX4200-24F. For ...
3
votes
1answer
498 views

Juniper EX4200 how to select s-vlan from c-vlan on dot1q-tunneling access port?

How do I tell Juniper EX4200 to push specific S-VLAN based on C-VLAN on q-in-q (dot1q-tunneling) port? For instance I want to instruct EX4200 to perform Q-in-Q using these rules: 1) If a single-tag ...
8
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1answer
21k views

What's the difference between TPID of 0x88a8 or 0x8100

I was reading over some JNCIS-SP documentation on provider bridging and it had this to say regarding the TPID field for QinQ: IEEE 802.1ad has reserved a TPID of 0x88a8 for the S-TAG however the ...
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votes
2answers
5k views

How is IEEE 802.1ad (aka VLAN Tagging, QinQ) valid, when the packets are too large?

Recently i've been dealing with MTU issues. And it all seems to stem from the fact that the ethernet adapter on newer computers default of a frame size of 1504 bytes: >netsh interface ipv4 show ...
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votes
2answers
1k views

Super Aggregated VLAN vs. Q-in-Q

Is Super Aggregated VLANs Brocades version of Q-in-Q? If any, what are some of the major differences between SAV and Q-in-Q?
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2answers
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Cisco 7600 q-in-q functionality on a Cisco 6500

Is it possible to make my existing 6509 switch function as a 7600 router? Even if it means purchasing a new sup or other inline card. I need certain router features, such as q-in-q tag termination. ...