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Hitless-supported services and protocols
(Continued)
TABLE 18
Traffic type Supported protocols
and services
Impact
Security 802.1X, including
use with VLANs
EAP with RADIUS
IPv4 ACLs
DHCP snooping
Dynamic ARP
inspection
IP source guard
Multi-device port
authentication
(MDPA), including
use with dynamic
VLANs
MAC port security
Supported security
protocols and services are
not impacted during a
switchover or failover, with
the following exceptions:
802.1X is impacted if
re-authentication
does not occur in a
specific time window.
MDPA is impacted if
re-authentication
does not occur in a
variable-length time
window.
In some cases, a few
IP source guard
packets may be
permitted or dropped.
If 802.1X and MDPA
are enabled together
on the same port,
both will be impacted
during a switchover
or failover. Hitless
support for these
features applies to
ports with 802.1X
only or multi-device
port authentication
only.
For MAC port
security, secure
MACs are
synchronized
between the active
and standby
controllers, so they
are hitless. However,
denied MACs are lost
during a switchover
or failover but may be
relearned if traffic is
present.
Configured ACLs will
operate in a hitless
manner, meaning the
system will continue to
permit and deny traffic
during the switchover or
failover process. However,
dynamic ACLs are not
supported for hitless
switchover and failover.
After a switchover or
failover, the new active
Traditional Stacking
100 FastIron Ethernet Switch Stacking Configuration Guide
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