topic VOSS Reserved VLAN ID's and I-SIDs in ExtremeSwitching (VSP/Fabric Engine)

VOSS Reserved VLAN ID's and I-SIDs

Anonymous — Thu, 20 May 2021 20:17:20 GMT

Hi,

Just compiling a list of possible VLAN ID and I-SID reservations to be aware of.

Reserved VLAN ID’s

If enable both vrf-scale flag and the spbmconfigmode flag, the switch reduces the number of configurable VLANs.

By default, VLAN IDs 1 to 4059 are configurable and the system reserves VLAN IDs 4060 to 4094 for internal use.

On switches that support the vrf-scaling and spbm-config-mode boot configuration flags, if you enable these flags, the system also reserves VLAN IDs 3500 to 3998.

4051 - 4052 Typically allocated to B-VLANs

4048 - Onboarding VLAN

Reserved I-SID’s

24-bit I-SID can take vales between 1 and 16777215

16777001 is used and membership of the Fabric Area Network is announced in TLV 147

Multicast stream is allocated a dedicated I-SID from 16,000,001 to16,600,000

Is there anymore that I am missing?

Many thanks,

Martin

Re: VOSS Reserved VLAN ID's and I-SIDs

Miguel-Angel_RO — Sun, 23 May 2021 20:17:13 GMT

Hi Martin,

Here what I have:

Mig

Re: VOSS Reserved VLAN ID's and I-SIDs

Anonymous — Sun, 23 May 2021 22:22:45 GMT

Thanks Mig, much appreciated.

Re: VOSS Reserved VLAN ID's and I-SIDs

Roger_Lapuh — Tue, 25 May 2021 17:42:18 GMT

15999999 is used as the onboarding ISID starting with 8.3.

Roger

Re: VOSS Reserved VLAN ID's and I-SIDs

Ludovico_Steven — Wed, 26 May 2021 19:22:28 GMT

Latest version of those tables:

Re: VOSS Reserved VLAN ID's and I-SIDs

PeterK — Wed, 26 May 2021 19:35:38 GMT

Hi Ludovico,

thanks for sharing. Can you explain where are VSP 7400,4900 and Universal5420,5520 placed?

Re: VOSS Reserved VLAN ID's and I-SIDs

Ludovico_Steven — Wed, 26 May 2021 19:43:08 GMT

Ah, good catch.. Unified-Hardware VOSS is in the same row as VSP8000,7200,4000.. actually 7400 is also there..

Re: VOSS Reserved VLAN ID's and I-SIDs

gfriedl — Wed, 30 Jun 2021 16:13:07 GMT

There is one more minor thing to add: when using Switched UNI, nearly the full range (1-4094) of VLAN-ID can be used, as this functionality does not rely on a platform VLAN.

Example:

int g 1/7

flex-uni enable

i-sid 333

c-vid 4094 port 1/7

show i-sid ============================================================================ Isid Info ============================================================================ ISID ISID PORT MLT ORIGIN ISID ID TYPE VLANID INTERFACES INTERFACES NAME ---------------------------------------------------------------------------- 333 ELAN N/A c4094:1/7 - C --- - --- - - ISID-333

Re: VOSS Reserved VLAN ID's and I-SIDs

mflammia1 — Wed, 03 Jan 2024 15:41:11 GMT

Just thought I would see if there is an update to the reservations, I ask, as seen the use of VLAN 4047 in relation to SD-WAN. So wondered if there was any others.

Many thanks.

Re: VOSS Reserved VLAN ID's and I-SIDs

EF — Tue, 06 May 2025 11:22:24 GMT

Please, could you share latest information including new hardware?

Best!!

Re: VOSS Reserved VLAN ID's and I-SIDs

WillyHe — Tue, 15 Jul 2025 11:37:10 GMT

Hello,

Have these lists been updated or do they still apply to both VOSS and FABRIC-ENGINE devices?

regards
WillyHe