VOSS Reserved VLAN ID's and I-SIDs

[Anonymous]

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

[gfriedl]

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      

[Ludovico_Steven]

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

[PeterK]

Hi Ludovico,

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

[Ludovico_Steven · Accepted solution]

Latest version of those tables: