07-09-2008 09:36 AM - edited 03-06-2019 12:06 AM
I have an ATM interface configured into a 6509 running MSFC-E with an ATM card on it. I can not see any packet dropping, but I have users complaining about that when they trace directly over the 6509. The other side we havea Cisco 7609 with ATM card on it. On each side the Cisco is connected to a Nortel Passport 7K
Is there any specific configuration or problem reported with this set up.
Thanks,
Gilson
07-09-2008 02:13 PM
Are they sure traffic is actually dropping, or is the router just not responding to all the traceroute packets because it is busy? A lot of people do not know how to use traceroute. If only the 6509 hop is droppong packets, but not points past it, the link is not dropping packets it is just a busy CPU on that node.
Otherwise it would be useful if you told us what you checked when you looked for dropped packets. Did you look at the SAR/AAL stats, or just the interface stats?
07-10-2008 06:54 AM
Hi Julin.
let me know if you have any ideas. I am not that ATM savvy.
I have investigated the ATM interface and it looks like we are taking too many incoming and outgoing packets being process switched processed packets.
sh atm traffic
Input OAM Queue: 0/2088 (size/max)
403572623 Input packets
293841017 Output packets
0 Broadcast packets
0 Packets received on non-existent VC
0 Packets attempted to send on non-existent VC
0 OAM cells received
F5 InEndloop: 0, F5 InSegloop: 0, F5 InAIS: 0, F5 InRDI: 0
F5 InEndcc: 0, F5 InSegcc: 0,
F4 InEndloop: 0, F4 InSegloop: 0, F4 InAIS: 0, F4 InRDI: 0
0 OAM cells sent
F5 OutEndloop: 0, F5 OutSegloop: 0, F5 OutAIS: 0 F5 OutRDI: 0
F5 OutEndcc: 0, F5 OutSegcc: 0,
F4 OutEndloop: 0, F4 OutSegloop: 0, F4 OutRDI: 0 F4 OutAIS: 0
0 OAM cell drops
This is the main connection between two major sites and we have a Cisco 7200 IOS running into a 6509 to support module:
7 0 4-subslot SPA Interface Processor-400 7600-SIP-400
I think at this point we need a police shape or change the design.
Here is how I have the ATM PVC configured and he output of the show atm PVC for both pvcs.
pvc CorePVC2 0/351
vbr-nrt 100000 100000 1
6509a#sh atm pvc 0/350
ATM7/0/0.1: VCD: 1, VPI: 0, VCI: 350, Connection Name: CorePVC1
VBR-NRT, PeakRate: 100000, Average Rate: 100000, Burst Cells: 1
AAL5-LLC/SNAP, etype:0x0, Flags: 0x20, VCmode: 0x0
OAM frequency: 0 second(s), OAM retry frequency: 1 second(s)OAM down retry count: 5
OAM Loopback status: OAM Disabled
OAM VC status: Not Managed
ILMI VC status: Not Managed
InARP frequency: 15 minutes(s)
Transmit priority 5
InPkts: 179295820, OutPkts: 164040365, InBytes: 190240473698, OutBytes: 49776263838
InPRoc: 281376, OutPRoc: 255120
InFast: 393, OutFast: 0, InAS: 179014055, OutAS: 163785245
InPktDrops: 0, OutPktDrops: 0
CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0, LengthViolation: 0, CPIErrors: 0
Out CLP=1 Pkts: 0
OAM cells received: 0
F5 InEndloop: 0, F5 InSegloop: 0, F5 InAIS: 0, F5 InRDI: 0
OAM cells sent: 0
F5 OutEndloop: 0, F5 OutSegloop: 0, F5 OutAIS: 0, F5 OutRDI: 0
OAM cell drops: 0
Status: UP
6509a#sh atm pvc 0/351
ATM7/0/0.2: VCD: 2, VPI: 0, VCI: 351, Connection Name: CorePVC2
VBR-NRT, PeakRate: 100000, Average Rate: 100000, Burst Cells: 1
AAL5-LLC/SNAP, etype:0x0, Flags: 0x20, VCmode: 0x0
OAM frequency: 0 second(s), OAM retry frequency: 1 second(s)OAM down retry count: 5
OAM Loopback status: OAM Disabled
OAM VC status: Not Managed
ILMI VC status: Not Managed
InARP frequency: 15 minutes(s)
Transmit priority 5
InPkts: 247570623, OutPkts: 147619384, InBytes: 252137011021, OutBytes: 68793723302
InPRoc: 181629, OutPRoc: 274012
InFast: 1743, OutFast: 0, InAS: 247387251, OutAS: 147345373
InPktDrops: 0, OutPktDrops: 0
CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0, LengthViolation: 0, CPIErrors: 0
Out CLP=1 Pkts: 0
OAM cells received: 0
F5 InEndloop: 0, F5 InSegloop: 0, F5 InAIS: 0, F5 InRDI: 0
OAM cells sent: 0
F5 OutEndloop: 0, F5 OutSegloop: 0, F5 OutAIS: 0, F5 OutRDI: 0
OAM cell drops: 0
Status: UP
6509a#
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