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VPN Acceleration Module 2+ (VAM2+) Installation and Configuration Guide
OL-5979-03
Chapter 4 Configuring the SA-VAM2+
Troubleshooting Tips
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To see if the SA-VAM2+ is currently processing crypto packets, enter the
show pas vam interface
command. The following is sample output:
Router#
show pas vam interface
VPN Acceleration Module Version II+ in slot : 3
Statistics for Hardware VPN Module since the last clear
of counters 314 seconds ago
5290894 packets in 5290895 packets out
1882478960 bytes in 1327439698 bytes out
16850 paks/sec in 16850 paks/sec out
47940 Kbits/sec in 33805 Kbits/sec out
4222173 pkts compressed 0 pkts not compressed
1190662374 bytes before compress 405331872 bytes after compress
2.9:1 compression ratio 2.9:1 overall
58 commands out 58 commands acknowledged
Last 5 minutes:
4855704 packets in 4855705 packets out
16185 paks/sec in 16185 paks/sec out
46723079 bits/sec in 32921855 bits/sec out
Errors:
ppq full errors : 0 ppq rx errors : 0
cmdq full errors : 0 cmdq rx errors : 0
no buffer : 0 replay errors : 0
dest overflow : 0 authentication errors : 0
Other error : 0 RNG self test fail : 0
DF Bit set : 0 Hash Miscompare : 0
Unwrappable object : 0 Missing attribute : 0
Invalid attrribute value: 0 Bad Attribute : 0
Verification Fail : 0 Decrypt Failure : 0
Invalid Packet : 0 Invalid Key : 0
Input Overrun : 0 Input Underrun : 0
Output buffer overrun : 0 Bad handle value : 0
Invalid parameter : 0 Bad function code : 0
Out of handles : 0 Access denied : 0
Warnings:
sessions_expired : 0 packets_fragmented : 0
general : 0 compress_bypassed : 4
HSP details:
hsp_operations : 75 hsp_sessions : 6
When the SA-VAM2+ processes packets, the “packets in” and “packets out” counter changes. Counter
“packets out” represents the number of packets directed to the SA-VAM2+. Counter “packets in”
represents the number of packets received from the SA-VAM2+.
Note
The
show pas vam interface
command output includes ‘compression ratio’ (or the efficiency of the
tunnel bandwidth) which represents the ratio of the original packet to the compressed packet plus the
ipsec headers. It does not represent the ratio of the ipsec payload before compression to the ipsec payload
after compression.
This ratio may fall below 1 when small packets are not compressible, resulting in the ratio representing
unencrypted packet to the encrypted packet plus the ipsec header.