Brocade FastIron Ethernet Switch Stacking Configuration Guide User Manual
Page 103
Hitless-supported services and protocols
(Continued)
TABLE 18
Traffic type
Supported protocols
and services
Impact
controller will re-
authenticate 802.1X or
MDPA sessions that were
being forwarded in
hardware. The hardware
continues to forward them
(even with dynamic VLAN)
while re-authentication
occurs. After trying to re-
authenticate for a certain
amount of time
(depending on the number
of sessions to re-
authorize), sessions that
did not re-authenticate are
removed.
Other
services to
Management
•
AAA
•
DHCP
•
sFlow
•
SNMP v1, v2, and
v3
•
SNMP traps
•
SNTP
•
Traceroute
Supported protocols and
services are not impacted
during a switchover or
failover.
DNS lookups will continue
after a switchover or
failover. This information
is not synchronized.
Ping traffic will be
minimally impacted.
NOTE
If the FCX stack is
rebooted, sFlow is
disabled on standby and
member units until the
configuration is
synchronized between the
active and standby
controllers.
Hitless stacking configuration notes and feature limitations
•
For hitless stacking on the FCX, Brocade recommends that you configure the traditional stack MAC
address using the stack mac command. Without this configuration, the MAC address of the stack
will change to the new base MAC address of the active controller. This could cause a spanning tree
root change. Even without a spanning tree change, a client (for example, a personal computer)
pinging the stack might encounter a long delay depending on the client MAC aging time. The client
will not work until it ages out the old MAC address and sends ARP requests to relearn the new
stack MAC address. Refer to
Manually allocating the traditional stack MAC address
•
Layer 3 multicast traffic is supported by hitless stacking.
Hitless stacking configuration notes and feature limitations
FastIron Ethernet Switch Stacking Configuration Guide
101
53-1003090-02