Displaying the SPA Hardware Type
To verify the SPA hardware type that is installed in your Cisco ASR 1000 Series Routers, use the
show
interfaces
, or
show controllers
commands. A number of other
show
commands also provide information
about the SPA hardware.
Displaying Over-Subscription Counters
This section provides information about an enhancement for displaying per-port oversubscription counters to
route processor. This change is specifically for displaying the dropped packets counters due to oversubscription
in the
overrun
field which is displayed in the
show interface atm slot/subslot/port
command output.
Overview
Each port on an ATM SPA supports a specific per-port bandwidth limit to function properly. For example,
the per-port bandwidth limit supported by, 1-Port Clear Channel OC-3 ATM SPA is 155.52 Mbps; 3-Port
Clear Channel OC-3 ATM SPA is 155.52 Mbps; and 1-Port Clear Channel OC-12 ATM SPA is 622.08 Mbps
respectively. If the port is oversubscribed beyond the specified limit, the packets are dropped.
Old Behavior
Before Cisco IOS XE Release 3.1.0S, even if a port was over-subscribed beyond the specified per-port
maximum bandwidth limit, the counter for dropped packets due to oversubscription was not displayed in
overrun
field in the
show interface atm slot/subslot/port
command output.
The following example shows the command output which does not display the counter for dropped-packets
in the
overrun
field:
Router#
show interfaces atm 0/2/2
ATM0/2/2 is up, line protocol is up
Hardware is SPA-3XOC3-ATM-V2, address is 001a.3044.7522 (bia 001a.3044.7522)
MTU 4470 bytes, sub MTU 4470, BW 149760 Kbit, DLY 80 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ATM, loopback not set
Keepalive not supported
Encapsulation(s): AAL5 AAL0
4095 maximum active VCs, 1 current VCCs
VC Auto Creation Disabled.
VC idle disconnect time: 300 seconds
4 carrier transitions
Last input never, output 00:04:11, output hang never
Last clearing of "show interface" counters never
Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
5 packets input, 540 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
5 packets output, 540 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
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Overview of the ATM SPAs
Displaying the SPA Hardware Type