ATM interface for 6509-MSFC-E

MachadoGB · ‎07-09-2008

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

b.julin · ‎07-09-2008

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?

MachadoGB · ‎07-10-2008

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#