loopback on routed port infrastructure is
or llc-oui based loopback traffic filtering is
is not bypassed. The egress port shaper cannot be bypassed.
Port shaper on
the ingress port in both external and internal loopback cannot be bypassed.
loopback is not supported on a range of dot1q tags.
supported in the shutdown state.
sessions cannot be initiated on a port configured with SPAN or RSPAN.
loopback, MAC swap is not supported for multicast or broadcast traffic.
Ethernet loopback (terminal or facility) session can be active on an EFP at any
Egress span on
the port and internal loopback on an EFP on the same port cannot be configured
at the same time.
Egress ACL is
not supported on the EFP.
number of 20 facility loopback sessions can be created per system, provided 16
sessions are with Dot1Q and 4 sessions are with Dot1Q and destination MAC
address. This scale reduces if SPAN or RSPAN is configured.
A maximum number
of 12 terminal loopback sessions can be created per system, provided 8 sessions
are with Dot1Q and 4 sessions are with Dot1Q and destination MAC address. This
scale reduces if RSPAN or SADT is configured .
Ethernet Data Plane Loopback session can also be launched when the interface or
port is in down state.
recommended to avoid performing any dynamic changes to the interface state when
the Ethernet Data Plane Loopback is configured on a port that is in the down
Plane Loopback is not supported with the XConnect service when the physical
interface port state is down.
Plane Loopback will be affected on STP enabled interface.
of rewrite ingress tags with default EFP is not supported.
at EFP and interface level are not supported when Ethernet Data Plane Loopback
inclusion in the configuration for default and untagged EFP disables the
Ethernet Data Plane Loopback.
When loopback is
configure for a default EFP on the the interface, then all the traffic
(ingressing) in this interface will get looped back.
BFD flaps on enabling internal loopback and traffic looped back
with line rate as both the traffic passes through the HPCT queue.