Cisco ASA 5505 Traffic Graph (bps) too high

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dbaddorf
Posts: 6
Joined: Tue Jun 05, 2007 10:33 am

Cisco ASA 5505 Traffic Graph (bps) too high

Post by dbaddorf »

When graphing our Cisco ASA 5505 firewall's outside interface, the bandwidth (in bps) at times exceeds the capacity of our Internet connection. For example, during one large download (which maxed one of our two unbundled T1's for a few hours) the traffic recorded on the outside interface of the ASA was 12Mbps.

I am using the same Cacti settings as the monitoring of PIX firewalls (running OS 6.3.5) which seem to correctly report the bandwidth. I've seen forum posts about the ASA's MIBS (like http://forums.cacti.net/viewtopic.php?t ... hlight=asa and http://forums.cacti.net/viewtopic.php?t ... cisco+mibs) but I don't pretend to know how to translate any of that information into getting the graphs to show correct values.

A little background on my setup: Windows XP, cacti-0.8.6h.1.2.exe (pre-built cacti installer for Windows), ASA devices tried as "Generic SNMP-enabled Host" or "Cisco ASA - Security Appliance", the interface graphs are created from the "New Graph" button which automatically displays the interfaces on the ASA, and a 20 second poll time (modified from the 5 minute default). Again, these settings worked fantastic for the PIX firewall, but not the ASA firewalls.

Any insight or help would be greatly appreciated. This is a great tool. :lol:

Thanks... Dave
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gandalf
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Location: Muenster, Germany
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Post by gandalf »

Please visit the failing graph at Graph Management, switch to DEBUG. Post the whole rrdtool graph statement
Reinhard
dbaddorf
Posts: 6
Joined: Tue Jun 05, 2007 10:33 am

Graph Debug

Post by dbaddorf »

I think this is the debug output that you requested. However, I believe that the problem is not with the graph as much as it is with the way that the ASA reports the interface values through SNMP. This same graph works quite well with the Cisco PIX firewalls. One difference between the PIX firewalls and the ASA 5505 is that on the PIX you define the interfaces directly. On the ASA you need to configure VLANs for the different security zones (like outside, inside, or dmz), and then you need to assign a VLAN to each physical interface. It is the named VLAN's which show up in the add interface traffic graph for Cacti, not the physical interfaces. This is different than both the ASA 5510's and above and from the PIX's. However, this is just my uneducated guess as to why the graphs are incorrect.

RRDTool Command:

c:/rrdtool/rrdtool.exe graph - \
--imgformat=PNG \
--start=-86400 \
--end=-20 \
--title="ASA 5505 - Traffic - outside" \
--rigid \
--base=1000 \
--height=120 \
--width=500 \
--upper-limit=1540000 \
--lower-limit=0 \
--vertical-label="bits per second" \
--slope-mode \
DEF:a="c\:/Inetpub/wwwroot/cacti/rra/asa_5505_traffic_in_39.rrd":traffic_in:AVERAGE \
DEF:b="c\:/Inetpub/wwwroot/cacti/rra/asa_5505_traffic_in_39.rrd":traffic_out:AVERAGE \
CDEF:cdefa=a,8,* \
CDEF:cdefe=b,8,* \
AREA:cdefa#00CF00:"Inbound" \
GPRINT:cdefa:LAST:" Current\:%8.2lf %s" \
GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n" \
LINE1:cdefe#002A97:"Outbound" \
GPRINT:cdefe:LAST:"Current\:%8.2lf %s" \
GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s"

RRDTool Says:

OK
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gandalf
Developer
Posts: 22383
Joined: Thu Dec 02, 2004 2:46 am
Location: Muenster, Germany
Contact:

Re: Graph Debug

Post by gandalf »

dbaddorf wrote:I think this is the debug output that you requested. However, I believe that the problem is not with the graph as much as it is with the way that the ASA reports the interface values through SNMP. This same graph works quite well with the Cisco PIX firewalls. One difference between the PIX firewalls and the ASA 5505 is that on the PIX you define the interfaces directly. On the ASA you need to configure VLANs for the different security zones (like outside, inside, or dmz), and then you need to assign a VLAN to each physical interface. It is the named VLAN's which show up in the add interface traffic graph for Cacti, not the physical interfaces. This is different than both the ASA 5510's and above and from the PIX's. However, this is just my uneducated guess as to why the graphs are incorrect.
Ok, let's go this way. Please find the polled OIDs for your target at System Utilities -> View Poller Cache. Filter for your target and find the OIDs that are polled. Try to snmpwalk from CLI to get an idea of what's going on
Reinhard
dbaddorf
Posts: 6
Joined: Tue Jun 05, 2007 10:33 am

Poller Cache & snmpwalk

Post by dbaddorf »

I really appreciate the help. I don't seem to see any reference here to the physical ports (there are 8 of them on an ASA5505)- only the VLAN's (named "inside", "outside", and "dmz"). Is there another command that I can use for snmpwalk to show me other snmp values (for the physical interfaces)?
Thanks... Dave

Poller Cache:
Data Source: ASA 5505 - Traffic - 123.123.123.123 - outside
RRD: c:\Inetpub\wwwroot\cacti\rra\asa_5505_traffic_in_39.rrd
Action: 0, OID: .1.3.6.1.2.1.2.2.1.16.2 (Host: 10.1.1.250, Community: public)

SNMPWALK:
C:\Program Files\net-snmp\bin>snmpwalk -v1 -c public 10.1.1.250
SNMPv2-MIB::sysDescr.0 = STRING: Cisco Adaptive Security Appliance Version 7.2(2
)
SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.9.1.745
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (456977800) 52 days, 21:22:58.0
0
SNMPv2-MIB::sysContact.0 = STRING:
SNMPv2-MIB::sysName.0 = STRING: iCeptsASA5505.default.domain.invalid
SNMPv2-MIB::sysLocation.0 = STRING:
SNMPv2-MIB::sysServices.0 = INTEGER: 4
IF-MIB::ifNumber.0 = INTEGER: 3
IF-MIB::ifIndex.1 = INTEGER: 1
IF-MIB::ifIndex.2 = INTEGER: 2
IF-MIB::ifIndex.3 = INTEGER: 3
IF-MIB::ifDescr.1 = STRING: Adaptive Security Appliance 'inside' interface
IF-MIB::ifDescr.2 = STRING: Adaptive Security Appliance 'outside' interface
IF-MIB::ifDescr.3 = STRING: Adaptive Security Appliance 'dmz' interface
IF-MIB::ifType.1 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifMtu.1 = INTEGER: 1500
IF-MIB::ifMtu.2 = INTEGER: 1500
IF-MIB::ifMtu.3 = INTEGER: 1500
IF-MIB::ifSpeed.1 = Gauge32: 1000000000
IF-MIB::ifSpeed.2 = Gauge32: 1000000000
IF-MIB::ifSpeed.3 = Gauge32: 1000000000
IF-MIB::ifPhysAddress.1 = STRING: 0:1b:53:1b:45:5a
IF-MIB::ifPhysAddress.2 = STRING: 0:1b:53:1b:45:5a
IF-MIB::ifPhysAddress.3 = STRING: 0:1b:53:1b:45:5a
IF-MIB::ifAdminStatus.1 = INTEGER: up(1)
IF-MIB::ifAdminStatus.2 = INTEGER: up(1)
IF-MIB::ifAdminStatus.3 = INTEGER: up(1)
IF-MIB::ifOperStatus.1 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: up(1)
IF-MIB::ifOperStatus.3 = INTEGER: up(1)
IF-MIB::ifLastChange.1 = Timeticks: (60200) 0:10:02.00
IF-MIB::ifLastChange.2 = Timeticks: (58400) 0:09:44.00
IF-MIB::ifLastChange.3 = Timeticks: (89000) 0:14:50.00
IF-MIB::ifInOctets.1 = Counter32: 321606708
IF-MIB::ifInOctets.2 = Counter32: 321606801
IF-MIB::ifInOctets.3 = Counter32: 321606894
IF-MIB::ifInUcastPkts.1 = Counter32: 510856424
IF-MIB::ifInUcastPkts.2 = Counter32: 510856425
IF-MIB::ifInUcastPkts.3 = Counter32: 510856426
IF-MIB::ifInNUcastPkts.1 = Counter32: 6478073
IF-MIB::ifInNUcastPkts.2 = Counter32: 6478073
IF-MIB::ifInNUcastPkts.3 = Counter32: 6478073
IF-MIB::ifInDiscards.1 = Counter32: 0
IF-MIB::ifInDiscards.2 = Counter32: 0
IF-MIB::ifInDiscards.3 = Counter32: 0
IF-MIB::ifInErrors.1 = Counter32: 0
IF-MIB::ifInErrors.2 = Counter32: 0
IF-MIB::ifInErrors.3 = Counter32: 0
IF-MIB::ifOutOctets.1 = Counter32: 1047447057
IF-MIB::ifOutOctets.2 = Counter32: 1047447196
IF-MIB::ifOutOctets.3 = Counter32: 1047447336
IF-MIB::ifOutUcastPkts.1 = Counter32: 572642511
IF-MIB::ifOutUcastPkts.2 = Counter32: 572642512
IF-MIB::ifOutUcastPkts.3 = Counter32: 572642513
IF-MIB::ifOutNUcastPkts.1 = Counter32: 1455192
IF-MIB::ifOutNUcastPkts.2 = Counter32: 1455192
IF-MIB::ifOutNUcastPkts.3 = Counter32: 1455192
IF-MIB::ifOutDiscards.1 = Counter32: 0
IF-MIB::ifOutDiscards.2 = Counter32: 0
IF-MIB::ifOutDiscards.3 = Counter32: 0
IF-MIB::ifOutErrors.1 = Counter32: 0
IF-MIB::ifOutErrors.2 = Counter32: 0
IF-MIB::ifOutErrors.3 = Counter32: 0
IF-MIB::ifOutQLen.1 = Gauge32: 0
IF-MIB::ifOutQLen.2 = Gauge32: 0
IF-MIB::ifOutQLen.3 = Gauge32: 0
IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.3 = OID: SNMPv2-SMI::zeroDotZero
IP-MIB::ipForwarding.0 = INTEGER: forwarding(1)
IP-MIB::ipAdEntAddr.10.1.1.250 = IpAddress: 10.1.1.250
IP-MIB::ipAdEntAddr.10.4.1.250 = IpAddress: 10.4.1.250
IP-MIB::ipAdEntAddr.123.123.123.123 = IpAddress: 123.123.123.123
IP-MIB::ipAdEntIfIndex.10.1.1.250 = INTEGER: 1
IP-MIB::ipAdEntIfIndex.10.4.1.250 = INTEGER: 3
IP-MIB::ipAdEntIfIndex.123.123.123.123 = INTEGER: 2
IP-MIB::ipAdEntNetMask.10.1.1.250 = IpAddress: 255.255.255.0
IP-MIB::ipAdEntNetMask.10.4.1.250 = IpAddress: 255.255.0.0
IP-MIB::ipAdEntNetMask.123.123.123.123 = IpAddress: 255.255.254.0
IP-MIB::ipAdEntBcastAddr.10.1.1.250 = INTEGER: 0
IP-MIB::ipAdEntBcastAddr.10.4.1.250 = INTEGER: 0
IP-MIB::ipAdEntBcastAddr.123.123.123.123 = INTEGER: 0
IP-MIB::ipAdEntReasmMaxSize.10.1.1.250 = INTEGER: 65535
IP-MIB::ipAdEntReasmMaxSize.10.4.1.250 = INTEGER: 65535
IP-MIB::ipAdEntReasmMaxSize.123.123.123.123 = INTEGER: 65535
SNMPv2-MIB::snmpInPkts.0 = Counter32: 426510
SNMPv2-MIB::snmpOutPkts.0 = Counter32: 426498
SNMPv2-MIB::snmpInBadVersions.0 = Counter32: 12
SNMPv2-MIB::snmpInBadCommunityNames.0 = Counter32: 0
SNMPv2-MIB::snmpInBadCommunityUses.0 = Counter32: 0
SNMPv2-MIB::snmpInASNParseErrs.0 = Counter32: 0
SNMPv2-MIB::snmpInTooBigs.0 = Counter32: 0
SNMPv2-MIB::snmpInNoSuchNames.0 = Counter32: 0
SNMPv2-MIB::snmpInBadValues.0 = Counter32: 0
SNMPv2-MIB::snmpInReadOnlys.0 = Counter32: 0
SNMPv2-MIB::snmpInGenErrs.0 = Counter32: 0
SNMPv2-MIB::snmpInTotalReqVars.0 = Counter32: 638919
SNMPv2-MIB::snmpInTotalSetVars.0 = Counter32: 0
SNMPv2-MIB::snmpInGetRequests.0 = Counter32: 424725
SNMPv2-MIB::snmpInGetNexts.0 = Counter32: 1787
SNMPv2-MIB::snmpInSetRequests.0 = Counter32: 0
SNMPv2-MIB::snmpInGetResponses.0 = Counter32: 0
SNMPv2-MIB::snmpInTraps.0 = Counter32: 0
SNMPv2-MIB::snmpOutTooBigs.0 = Counter32: 0
SNMPv2-MIB::snmpOutNoSuchNames.0 = Counter32: 1
SNMPv2-MIB::snmpOutBadValues.0 = Counter32: 0
SNMPv2-MIB::snmpOutGenErrs.0 = Counter32: 0
SNMPv2-MIB::snmpOutGetRequests.0 = Counter32: 0
SNMPv2-MIB::snmpOutGetNexts.0 = Counter32: 0
SNMPv2-MIB::snmpOutSetRequests.0 = Counter32: 0
SNMPv2-MIB::snmpOutGetResponses.0 = Counter32: 426522
SNMPv2-MIB::snmpOutTraps.0 = Counter32: 0
SNMPv2-MIB::snmpEnableAuthenTraps.0 = INTEGER: 0
SNMPv2-MIB::snmpSilentDrops.0 = Counter32: 0
SNMPv2-MIB::snmpProxyDrops.0 = Counter32: 0
IF-MIB::ifName.1 = STRING: inside
IF-MIB::ifName.2 = STRING: outside
IF-MIB::ifName.3 = STRING: dmz
IF-MIB::ifInMulticastPkts.1 = Counter32: 0
IF-MIB::ifInMulticastPkts.2 = Counter32: 0
IF-MIB::ifInMulticastPkts.3 = Counter32: 0
IF-MIB::ifInBroadcastPkts.1 = Counter32: 0
IF-MIB::ifInBroadcastPkts.2 = Counter32: 0
IF-MIB::ifInBroadcastPkts.3 = Counter32: 0
IF-MIB::ifOutMulticastPkts.1 = Counter32: 0
IF-MIB::ifOutMulticastPkts.2 = Counter32: 0
IF-MIB::ifOutMulticastPkts.3 = Counter32: 0
IF-MIB::ifOutBroadcastPkts.1 = Counter32: 0
IF-MIB::ifOutBroadcastPkts.2 = Counter32: 0
IF-MIB::ifOutBroadcastPkts.3 = Counter32: 0
IF-MIB::ifLinkUpDownTrapEnable.1 = INTEGER: enabled(1)
IF-MIB::ifLinkUpDownTrapEnable.2 = INTEGER: enabled(1)
IF-MIB::ifLinkUpDownTrapEnable.3 = INTEGER: enabled(1)
IF-MIB::ifHighSpeed.1 = Gauge32: 1000
IF-MIB::ifHighSpeed.2 = Gauge32: 1000
IF-MIB::ifHighSpeed.3 = Gauge32: 1000
IF-MIB::ifPromiscuousMode.1 = INTEGER: false(2)
IF-MIB::ifPromiscuousMode.2 = INTEGER: false(2)
IF-MIB::ifPromiscuousMode.3 = INTEGER: false(2)
IF-MIB::ifConnectorPresent.1 = INTEGER: true(1)
IF-MIB::ifConnectorPresent.2 = INTEGER: true(1)
IF-MIB::ifConnectorPresent.3 = INTEGER: true(1)
IF-MIB::ifAlias.1 = STRING:
IF-MIB::ifAlias.2 = STRING:
IF-MIB::ifAlias.3 = STRING:
IF-MIB::ifCounterDiscontinuityTime.1 = Timeticks: (0) 0:00:00.00
IF-MIB::ifCounterDiscontinuityTime.2 = Timeticks: (0) 0:00:00.00
IF-MIB::ifCounterDiscontinuityTime.3 = Timeticks: (0) 0:00:00.00
SNMPv2-SMI::mib-2.47.1.1.1.1.2.1 = STRING: "ASA 5505 Adaptive Security Appliance
"
SNMPv2-SMI::mib-2.47.1.1.1.1.3.1 = OID: SNMPv2-SMI::enterprises.9.12.3.1.3.560
SNMPv2-SMI::mib-2.47.1.1.1.1.4.1 = INTEGER: 0
SNMPv2-SMI::mib-2.47.1.1.1.1.5.1 = INTEGER: 3
SNMPv2-SMI::mib-2.47.1.1.1.1.6.1 = INTEGER: 0
SNMPv2-SMI::mib-2.47.1.1.1.1.7.1 = STRING: "Chassis"
SNMPv2-SMI::mib-2.47.1.1.1.1.8.1 = STRING: "V02 "
SNMPv2-SMI::mib-2.47.1.1.1.1.9.1 = STRING: "1.0(12)6"
SNMPv2-SMI::mib-2.47.1.1.1.1.10.1 = STRING: "7.2(2)"
SNMPv2-SMI::mib-2.47.1.1.1.1.11.1 = STRING: "JMX1110K1BQ"
SNMPv2-SMI::mib-2.47.1.1.1.1.12.1 = STRING: "cisco Systems Inc."
SNMPv2-SMI::mib-2.47.1.1.1.1.13.1 = STRING: "ASA5505"
SNMPv2-SMI::mib-2.47.1.1.1.1.14.1 = ""
SNMPv2-SMI::mib-2.47.1.1.1.1.15.1 = ""
SNMPv2-SMI::mib-2.47.1.1.1.1.16.1 = INTEGER: 2
SNMPv2-SMI::mib-2.47.1.2.1.1.2.1 = STRING: " (Functional Role: Router)"
SNMPv2-SMI::mib-2.47.1.2.1.1.2.2 = STRING: " (Functional Role: Intranet VPN Hub)
"
SNMPv2-SMI::mib-2.47.1.2.1.1.2.3 = STRING: " (Functional Role: Remote Access Hub
)"
SNMPv2-SMI::mib-2.47.1.2.1.1.2.4 = STRING: " (Functional Role: Layer2/3 Firewall
)"
SNMPv2-SMI::mib-2.47.1.2.1.1.3.1 = OID: SNMPv2-SMI::mib-2
SNMPv2-SMI::mib-2.47.1.2.1.1.3.2 = OID: SNMPv2-SMI::enterprises.9.9.171
SNMPv2-SMI::mib-2.47.1.2.1.1.3.3 = OID: SNMPv2-SMI::enterprises.9.9.392
SNMPv2-SMI::mib-2.47.1.2.1.1.3.4 = OID: SNMPv2-SMI::enterprises.9.9.147
SNMPv2-SMI::mib-2.47.1.2.1.1.4.1 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.4.2 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.4.3 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.4.4 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.5.1 = Hex-STRING: 0A 01 01 FA 00 A1
SNMPv2-SMI::mib-2.47.1.2.1.1.5.2 = Hex-STRING: 0A 01 01 FA 00 A1
SNMPv2-SMI::mib-2.47.1.2.1.1.5.3 = Hex-STRING: 0A 01 01 FA 00 A1
SNMPv2-SMI::mib-2.47.1.2.1.1.5.4 = Hex-STRING: 0A 01 01 FA 00 A1
SNMPv2-SMI::mib-2.47.1.2.1.1.6.1 = OID: SNMPv2-TM::snmpUDPDomain
SNMPv2-SMI::mib-2.47.1.2.1.1.6.2 = OID: SNMPv2-TM::snmpUDPDomain
SNMPv2-SMI::mib-2.47.1.2.1.1.6.3 = OID: SNMPv2-TM::snmpUDPDomain
SNMPv2-SMI::mib-2.47.1.2.1.1.6.4 = OID: SNMPv2-TM::snmpUDPDomain
SNMPv2-SMI::mib-2.47.1.2.1.1.7.1 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.7.2 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.7.3 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.7.4 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.8.1 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.8.2 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.8.3 = ""
SNMPv2-SMI::mib-2.47.1.2.1.1.8.4 = ""
SNMPv2-SMI::mib-2.47.1.3.1.1.1.1.1 = INTEGER: 1
SNMPv2-SMI::mib-2.47.1.3.1.1.1.2.1 = INTEGER: 1
SNMPv2-SMI::mib-2.47.1.3.1.1.1.3.1 = INTEGER: 1
SNMPv2-SMI::mib-2.47.1.3.1.1.1.4.1 = INTEGER: 1
SNMPv2-SMI::mib-2.47.1.4.1.0 = Timeticks: (0) 0:00:00.00
User avatar
gandalf
Developer
Posts: 22383
Joined: Thu Dec 02, 2004 2:46 am
Location: Muenster, Germany
Contact:

Re: Poller Cache & snmpwalk

Post by gandalf »

dbaddorf wrote:I really appreciate the help. I don't seem to see any reference here to the physical ports (there are 8 of them on an ASA5505)- only the VLAN's (named "inside", "outside", and "dmz"). Is there another command that I can use for snmpwalk to show me other snmp values (for the physical interfaces)?
Thanks... Dave

Poller Cache:
Data Source: ASA 5505 - Traffic - 123.123.123.123 - outside
RRD: c:\Inetpub\wwwroot\cacti\rra\asa_5505_traffic_in_39.rrd
Action: 0, OID: .1.3.6.1.2.1.2.2.1.16.2 (Host: 10.1.1.250, Community: public)
This is the only entry for this host? It will show ifOutOctest for if#2 only
Reinhard
dbaddorf
Posts: 6
Joined: Tue Jun 05, 2007 10:33 am

poller cache

Post by dbaddorf »

Here is another entry in the cache:
Data Source: ASA 5505 - Traffic - 123.123.123.123 - outside
RRD: c:\Inetpub\wwwroot\cacti\rra\asa_5505_traffic_in_39.rrd
Action: 0, OID: .1.3.6.1.2.1.2.2.1.10.2 (Host: 10.1.1.250, Community: public)
dbaddorf
Posts: 6
Joined: Tue Jun 05, 2007 10:33 am

ASA 5505 upgrade

Post by dbaddorf »

After upgrading the ASA 5505 to version 8.0(2) the graphs seem to be fixed.
Thanks for the help!
Dave
sloop
Posts: 23
Joined: Tue Oct 17, 2006 10:09 am

Post by sloop »

Did 8.0 allow you to graph the physical ethernet ports? Or it fixed the graphing of the vlan interfaces? I'm having the same problem with version 7.2(2)
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dbaddorf
Posts: 6
Joined: Tue Jun 05, 2007 10:33 am

ASA5505

Post by dbaddorf »

Upgrading to 8.0(2) allowed the vlan traffic to be monitored correctly. However I didn't see any Ethernet ports when I go to Add a Graph - only the vlan "ports".
I hope this helps...
Thanks.. dave
muck
Posts: 1
Joined: Mon Mar 26, 2007 5:38 pm

OS bug

Post by muck »

This is a bug with 7.2 OS that causes the 5505 to return the combined total for all untagged vlan traffic, instead of per vlan traffic.

I wrote about it here, and there is also a link to the cisco BugID: http://www.muck.net/?p=11
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