Esrp-Aware Switches - Extreme Networks ExtremeWare XOS Guide Manual

Extreme Standby Router Protocol

ESRP-Aware Switches

Extreme Networks switches that are not actively participating in ESRP but are connected on a network
that has other Extreme Networks switches running ESRP are ESRP-aware. When ESRP-aware switches
are attached to ESRP-enabled switches, the ESRP-aware switches reliably perform failover and failback
scenarios in the prescribed recovery times.
If Extreme Networks switches running ESRP are connected to Layer 2 switches that are manufactured
by third-party vendors, the failover times for traffic local to that segment may appear longer, depending
on the application involved and the FDB timer used by the other vendor's Layer 2 switch. ESRP can be
used with Layer 2 switches from other vendors, but the recovery times vary.
The VLANs associated with the ports connecting an ESRP-aware switch to an ESRP-enabled switch
must be configured using an 802.1Q tag on the connecting port; or, if only a single VLAN is involved, as
untagged using the protocol filter
interconnection port is configured for a protocol-sensitive VLAN using untagged traffic. You can also
use port restart in this scenario. For more information about port restart, see
page 473.
Configuring ESRP-Aware Switches
For an Extreme Networks switch to be ESRP-aware, you must create an ESRP domain on the aware
switch, add a master VLAN to that ESRP domain, and configure a domain ID, if necessary.
To participate as an ESRP-aware switch, the following must be true:
The ESRP domain name must identical on all switches (ESRP-enabled and ESRP-aware) participating
●
in ESRP for that particular domain.
The master VLAN name and IP address must be identical on all switches (ESRP-enabled and ESRP-
●
aware) participating in ESRP for that particular domain.
The domain ID must be identical on all switches (ESRP-enabled or ESRP-aware) participating in
●
ESRP for that particular domain.
If you have an untagged master VLAN, you must specify an ESRP domain ID.
■
If you have a tagged master VLAN, ESRP uses the 802.1Q tag (VLANid) of the master VLAN for
■
the ESRP domain ID. If you do not use the VLANid as the domain ID, you must specify a
different domain ID.
NOTE
Before you begin, make a note of the ESRP domain parameters on the ESRP-enabled switch. That way you can
easily refer to your notes while creating the ESRP domain on the ESRP-aware switch.
To configure an ESRP-aware switch, complete the following steps:
1 Create an ESRP domain using the
After you create the domain, do not enable it.
2 Add a master VLAN to your ESRP domain using the
<vlan_name>
You are only required to add a master VLAN to the ESRP domain. You are not required to add
member VLANs to the ESRP domain.
3 If necessary, configure a domain ID for the ESRP domain using the
domain-id <number>
458
. ESRP will not function correctly if the ESRP-aware switch
any
create esrp <esrpDomain>
command.
command.
"ESRP Port Restart" on
command.
configure esrp <esrpDomain> add master
configure esrp <esrpDomain>
ExtremeWare XOS 11.3 Concepts Guide