Cisco CRS-1 - Carrier Routing System Router Troubleshooting Manual page 124

Understanding the Flags Field
Table 4-1
L - link port admin down—link has been taken out
of service by administrative action
A - asic admin down —ASIC has been taken out
of service by administrative action. If the A flag is
set, it is seen on all links connected to that ASIC
B - bundle port admin down—bundle port has
been taken out of service by administrative action.
If the B flag is set, it is seen on all links associated
to that bundle
I - bundle admin down—bundle has been taken
out of service by administrative action
N - node admin down—Node has been taken out
of service by administrative action
o - other end of link down—only applies to TX
links. Indicates that receiver link port is down
f - failed component downstream—flag is set by
fabric status database if it decides to stop using a
link because of some downstream failure
m - plane multicast down— not all fabric queue
ASICs present on the plane are reachable;
multicast forwarding is not operational on this
plane. Unicast traffic is unaffected.
Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
4-114
Fabric show Command Flags (continued)
Chapter 4 Troubleshooting Router Switch Fabric
l - linkport oper down—flag is set or cleared in
response to messages from the ASIC driver code.
Flags are enabled when the asic is first
discovered. Flag is set if the ASIC driver has
signaled that an individual link port is not usable
for fabric traffic, or that the driver has confirmed
that the link is ready. Two common reasons for
seeing an l flag that are initialization is not
completed yet or that sufficient errors have been
seen at a receive port so that the ASIC driver shuts
the port down
a - asic oper down —flag is set or cleared in
response to messages from the ASIC driver code.
Flags are enabled when the ASIC is first
discovered. Flag is set if the ASIC driver has
signaled that an SEA ASIC is not usable for fabric
traffic. If the a flag is set, it is seen on all links
connected to that ASIC
b - bundle port oper down—bundle port cannot
operate or has been taken out of service by
administrative action. If the b flag is set, it is seen
on all links associated to that bundle
i - bundle oper down—bundle cannot operate or
has been taken out of service by administrative
action
n - node down—node cannot operate or has been
taken out of service by administrative action
d - data down— idle cells are being transmitted or
received, but link is not able to transport data
cells. Flag is set in response to a message from the
ASIC driver. Link ports go into this state during
link startup. It is typically transient and should
only persist if something goes wrong with the
startup process
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