Lenovo ThinkSystem NE2552E, Application Manual

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NE2552E Application Guide for ENOS 8.4
VLAG Capacities
Servers or switches that connect to the VLAG peers using a multi ‐ port VLAG are
considered VLAG clients. VLAG clients are not required to be VLAG ‐ capable. The
ports participating in the VLAG are configured as regular port LAGs on the VLAG
client end.
On the VLAG peers, the VLAGs are configured similarly to regular port LAGs,
using many of the same features and rules. See “Ports and Link Aggregation
(LAG)” on page 155 for general information concerning all port LAGs.
Each VLAG begins as a regular port LAG on each VLAG ‐ peer switch. The VLAG
may be either a static LAG (portchannel) or dynamic LACP LAG and consumes
one slot from the overall port LAG capacity pool. The type of aggregation must
match that used on VLAG client devices. Additional configuration is then required
to implement the VLAG on both VLAG peer switches.
You may configure up to 52 LAGs on the switch, with all types (regular or VLAG,
static or LACP) sharing the same pool.
The maximum number of configurable VLAG instances is as follows:
 With STP off: Maximum of 31 VLAG instances
 With STP on:

PVRST/MSTP with one VLAG instance per VLAN/STG: Maximum of 31
VLAG instances

PVRST/MSTP with one VLAG instance belonging to multiple
VLANs/STGs: Maximum of 20 VLAG instances
Note:
VLAG is not supported in RSTP mode.
Each type of aggregation can contain up to 32 member ports, depending on the
port type and availability.