Specifications

Clarifications and Known Behaviors
ExtremeWare 7.0 Release Notes 49
ESRP and Load Sharing
If you enable load sharing on ports that belong to more than 200 VLANs, the switch reboots. To avoid
this, first enable load sharing, then add the ports to the VLANs (PD2-99259801).
When using load sharing with the ESRP host attach or don't count features, configure all ports in the
same load-sharing group as host attach ports or don’t-count ports (PD2-97342427, PD2-106782876).
Hot-Swapping a Module with 5,000 ACLs
Hot-swapping a module on a switch that has 5,000 or more ACLs configured can cause an ESRP state
change (PD2-107800998, PD2-103938301). To avoid the state change, configure the neighbor timeout
value to 12 seconds.
Traffic Convergence Time
Traffic convergence after a link failure can take as long as 5 seconds with 2,000 VLANs and 256,000 FDB
entries. This delay can cause ESRP state changes as traffic converges (PD2-89915300).
ESRP PDUs on Ports
ESRP PDUs received on ports that do not belong to any VLAN are processed as valid ESRP PDUs and
can trigger state changes (PD2-89481346). To avoid this, assign all ports to valid VLANs.
Multiple ESRP VLANs
If multiple ESRP VLANs share a host port, each VLAN must be in a different ESRP group.
ESRP Interoperability
We recommend that all switches participating directly in ESRP be running the same version of
ExtremeWare. If you must mix ExtremeWare versions, do not use any of the ESRP features new to this
release.
Mixing Clients and Routers on an ESRP-Enabled VLAN
Typically, ESRP is not be enabled on a VLAN that is also expected to exchange routes with other
non-ESRP routers (e.g.: routers using RIP or OSPF). ESRP is intended and designed as a Layer 2 or
Layer 3 redundancy method for clients with a single default route. ESRP’s fail-over operation may
interfere with normal routing protocol communication if an ESRP-enabled VLAN contains other routers
not using ESRP (4874).
ESRP and Bi-Directional Rate Shaping
When a single ESRP VLAN is configured with bi-directional rate shaping ports and no direct physical
connection to the 2
nd
ESRP router, the ESRP slave router flips back and forth to Master state. If a second
rate-shaped VLAN or a direct link between the 2 ESRP routers exists, this will not occur (10739).
When ESRP and bi-directional rate shaping are configured simultaneously on the same switch, rate
shaping traffic to the ESRP MAC address will not take effect until the switch is rebooted (13583).