4

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?

4

Same thing, different (older) branding. Normally for 802.1ad there's a C-TAG and an S-TAG. The C-TAG (customer tag) will have almost always have a value of 8100 set in its TPID (tag protocol identifier) field. The S-TAG (service tag - the tag on top) will have a separate set of fields (same as the C-TAG: PCP/DEI/TPID/VID bits) and its TPID should be 0x88a8 by the standard. A lot of vendors will let you set the value for the S-TAG TPID to something arbitrary (Brocade likes to recommend 9100 a lot - probably for compatibility reasons). Some vendors (Brocade also being one of them) will let you also set the C-TAG TPID but I can't think of any useful reason why someone would want to deviate from the norm of 8100. It's more common to want/need to change the S-TAG TPID value.

| improve this answer | |
4

Its not so much Brocades 'version' of Q-in-Q as it still uses the standard, think of it more as a difference in vocabulary, it is still compatible with other vendors such as a Cisco device running a normal qinq tunnel interface.

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.