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RTP packets get backed up only one way.

Michael Durham
Level 4
Level 4

I am trying to get my IP phone to work well.  The system works fine but when I call someone the don't hear me sometimes and mostly if I speak quickly.  I am now using G729 which helped a good bit but not completely.

I had my SIP provider do a WireShark packet capture when I was using G711u and they said my outbound rtp packets were getting stacked up real bad.  My inbound rtp packets are jsut fine.  I attached the capture below.

Can someone help me figure out where and why my outbound rtp packets are being stacked up please? 

I have a copy of WireShark but would need a little help in how to set it up to capture the packets on the Internet side of my 2851 router.  Or, is there some debug commands that I could run to help locate the problem.  The one place I cannot run wireshark from is the office side (see below).  But I can run any debug commands on the office routers.

[    Home                                                                                                  }             Internet                            [    Office                                 

home IP Phone --->  3550 Switch_1 ----> 3550 Switch_2 ------> 2851 router ----> VPN Tunnel over the Internet  -----> 2801 edge router -----> 3524 switch  ------> 2851 CME router.

My office CME router has a SIP connection to Broadvox.

Home-to-Office.jpg

Calls made to the phone on the 192.168.2.0 network work GREAT!  Just calls made to the SIP provider have a problem.

7 Replies 7

Michael Durham
Level 4
Level 4

I still need help with this please!

Hi Michael,

Did you apply QoS? If you're lossing audio only sometime look like the problem is bandwith.

Regards

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QoS is applied to the switches on hte home side.  Applied class-map to my router.  Yes, the bandwidth is low on th upload side 1-2MBs.  Am now usingthe G729r8 codec to save on bnadwidth usage.

When the voice is chopping, did you see if router is dropping packet?

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Please tell me what command to run to see that and I will get back to you with that info.

show interface "interface"

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The first two outputs are from the rotuers at the office side of the tunnel, The third output is from my home edge router.  Rememver, I am connected to my office's CME router for my phone service. These outputs were taken after a 1 munite phone call over the tunner to a landline.  The audio was very bad to the landline.

OFFICE CME ROUTER


GigabitEthernet0/0 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 001e.7a5d.8fa0 (bia 001e.7a5d.8fa0)
  Internet address is 55.9.6.91/29
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full Duplex, 1Gbps, media type is T
  output flow-control is XON, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:06, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 15000 bits/sec, 15 packets/sec
  5 minute output rate 15000 bits/sec, 14 packets/sec
     1299977 packets input, 268699417 bytes, 1 no buffer
     Received 70626 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 1 throttles
     10 input errors, 0 CRC, 0 frame, 0 overrun, 10 ignored
     0 watchdog, 0 multicast, 0 pause input
     1292677 packets output, 256958568 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     33 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
Service-Engine0/0 is up, line protocol is up
  Hardware is I82559FE, address is 001e.7a5d.8fa2 (bia 001e.7a5d.8fa2)
  Interface is unnumbered. Using address of GigabitEthernet0/1.2 (192.168.2.1)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:02, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (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
     327885 packets input, 57548371 bytes, 0 no buffer
     Received 145 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     770591 packets output, 112308153 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
GigabitEthernet0/1 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 001e.7a5d.8fa1 (bia 001e.7a5d.8fa1)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
  Keepalive set (10 sec)
  Full Duplex, 100Mbps, media type is T
  output flow-control is XON, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 15000 bits/sec, 15 packets/sec
  5 minute output rate 15000 bits/sec, 16 packets/sec
     3762297 packets input, 453784983 bytes, 0 no buffer
     Received 366698 broadcasts (264804 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     4463473 packets output, 499193175 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     224 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
GigabitEthernet0/1.2 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 001e.7a5d.8fa1 (bia 001e.7a5d.8fa1)
  Internet address is 192.168.2.1/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  2.
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
GigabitEthernet0/1.10 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 001e.7a5d.8fa1 (bia 001e.7a5d.8fa1)
  Internet address is 192.168.10.5/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  10.
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
NVI0 is up, line protocol is up
  Hardware is NVI
  Interface is unnumbered. Using address of GigabitEthernet0/0 (55.9.6.91)
  MTU 1514 bytes, BW 56 Kbit/sec, DLY 5000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation UNKNOWN, loopback not set
  Keepalive set (10 sec)
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 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
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out

OFFICE EDGE ROUTER

FastEthernet0/0 is up, line protocol is up
  Hardware is Gt96k FE, address is 0019.e792.17ae (bia 0019.e792.17ae)
  Internet address is 55.9.6.90/29
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 34000 bits/sec, 28 packets/sec
  5 minute output rate 31000 bits/sec, 29 packets/sec
     6056624 packets input, 900738211 bytes
     Received 75191 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     4840139 packets output, 1025607872 bytes, 0 underruns
     0 output errors, 0 collisions, 7 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
FastEthernet0/1 is up, line protocol is up
  Hardware is Gt96k FE, address is 0019.e792.17af (bia 0019.e792.17af)
  Internet address is 192.168.10.1/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:03, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 28000 bits/sec, 29 packets/sec
  5 minute output rate 29000 bits/sec, 28 packets/sec
     4566399 packets input, 874388593 bytes
     Received 340544 broadcasts (264783 IP multicasts)
     0 runts, 0 giants, 0 throttles
     1 input errors, 0 CRC, 0 frame, 0 overrun, 1 ignored
     0 watchdog
     0 input packets with dribble condition detected
     5955439 packets output, 739508274 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     227 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
NVI0 is up, line protocol is up
  Hardware is NVI
  Interface is unnumbered. Using address of FastEthernet0/0 (55.9.6.90)
  MTU 1514 bytes, BW 56 Kbit/sec, DLY 5000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation UNKNOWN, loopback not set
  Keepalive set (10 sec)
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 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
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
Tunnel0 is up, line protocol is up
  Hardware is Tunnel
  Internet address is 172.30.1.1/30
  MTU 17912 bytes, BW 20000 Kbit/sec, DLY 50000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation TUNNEL, loopback not set
  Keepalive not set
  Tunnel source 55.9.6.90 (FastEthernet0/0)
   Tunnel Subblocks:
      src-track:
         Tunnel0 source tracking subblock associated with FastEthernet0/0
          Set of tunnels with source FastEthernet0/0, 1 member (includes iterators), on interface
  Tunnel protocol/transport multi-GRE/IP
    Key 0x1, sequencing disabled
    Checksumming of packets disabled
  Tunnel TTL 255, Fast tunneling enabled
  Tunnel transport MTU 1472 bytes
  Tunnel transmit bandwidth 8000 (kbps)
  Tunnel receive bandwidth 8000 (kbps)
  Tunnel protection via IPSec (profile "FLA-WA")
  Last input 00:00:00, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 38
  Queueing strategy: fifo
  Output queue: 0/0 (size/max)
  5 minute input rate 24000 bits/sec, 27 packets/sec
  5 minute output rate 29000 bits/sec, 28 packets/sec
     1441556 packets input, 108499847 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
     1462878 packets output, 216434793 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out

CME HOME ROUTER

GigabitEthernet0/0 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 0021.5527.1340 (bia 0021.5527.1340)
  Description: Router - C3524 Port Fa0/23 192.168.70.1
  Internet address is 110.7.8.138/29
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full Duplex, 100Mbps, media type is T
  output flow-control is XON, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:04, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: Class-based queueing
  Output queue: 0/1000/0 (size/max total/drops)
  5 minute input rate 180000 bits/sec, 59 packets/sec
  5 minute output rate 46000 bits/sec, 48 packets/sec
     64355787 packets input, 3006359974 bytes, 0 no buffer
     Received 27017 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     4 input errors, 0 CRC, 4 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     37841765 packets output, 3234187634 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     68 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
GigabitEthernet0/0.69 is deleted, line protocol is down
  Hardware is MV96340 Ethernet, address is 0021.5527.1340 (bia 0021.5527.1340)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
GigabitEthernet0/1 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 0021.5527.1341 (bia 0021.5527.1341)
  Description: Router - C3524 Port Fa0/20 Trunk
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
  Keepalive set (10 sec)
  Full Duplex, 100Mbps, media type is T
  output flow-control is XON, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 122000 bits/sec, 109 packets/sec
  5 minute output rate 172000 bits/sec, 73 packets/sec
     197513221 packets input, 59869928 bytes, 0 no buffer
     Received 5112545 broadcasts (127399298 IP multicasts)
     1 runts, 0 giants, 0 throttles
     3 input errors, 1 CRC, 0 frame, 0 overrun, 1 ignored
     0 watchdog, 0 multicast, 0 pause input
     94663333 packets output, 1976937090 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
GigabitEthernet0/1.3 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 0021.5527.1341 (bia 0021.5527.1341)
  Internet address is 192.168.3.1/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  3.
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
GigabitEthernet0/1.30 is deleted, line protocol is down
  Hardware is MV96340 Ethernet, address is 0021.5527.1341 (bia 0021.5527.1341)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
GigabitEthernet0/1.69 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 0021.5527.1341 (bia 0021.5527.1341)
  Internet address is 192.168.69.3/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  69.
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
GigabitEthernet0/1.100 is deleted, line protocol is down
  Hardware is MV96340 Ethernet, address is 0021.5527.1341 (bia 0021.5527.1341)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
GigabitEthernet0/1.110 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 0021.5527.1341 (bia 0021.5527.1341)
  Internet address is 10.110.0.1/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  110.
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
GigabitEthernet0/1.115 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 0021.5527.1341 (bia 0021.5527.1341)
  Internet address is 10.115.0.1/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  115.
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
GigabitEthernet0/1.125 is deleted, line protocol is down
  Hardware is MV96340 Ethernet, address is 0021.5527.1341 (bia 0021.5527.1341)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA
  ARP type: ARPA, ARP Timeout 04:00:00
  Keepalive set (10 sec)
  Last clearing of "show interface" counters never
NVI0 is up, line protocol is up
  Hardware is NVI
  Interface is unnumbered. Using address of GigabitEthernet0/0 (110.7.8.138)
  MTU 1514 bytes, BW 56 Kbit/sec, DLY 5000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation UNKNOWN, loopback not set
  Keepalive set (10 sec)
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 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
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
Tunnel0 is up, line protocol is up
  Hardware is Tunnel
  Internet address is 172.30.1.2/30
  MTU 17850 bytes, BW 20000 Kbit/sec, DLY 50000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation TUNNEL, loopback not set
  Keepalive not set
  Tunnel source 110.7.8.138 (GigabitEthernet0/0), destination 55.9.6.90
   Tunnel Subblocks:
      src-track:
         Tunnel0 source tracking subblock associated with GigabitEthernet0/0
          Set of tunnels with source GigabitEthernet0/0, 1 member (includes iterators), on interface
  Tunnel protocol/transport GRE/IP
    Key 0x1, sequencing disabled
    Checksumming of packets disabled
  Tunnel TTL 255, Fast tunneling enabled
  Tunnel transport MTU 1410 bytes
  Tunnel transmit bandwidth 8000 (kbps)
  Tunnel receive bandwidth 8000 (kbps)
  Tunnel protection via IPSec (profile "WA-FLA")
  Last input 00:00:04, output 3w5d, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 40057
  Queueing strategy: fifo (QOS pre-classification)
  Output queue: 0/0 (size/max)
  5 minute input rate 24000 bits/sec, 37 packets/sec
  5 minute output rate 37000 bits/sec, 37 packets/sec
     3311406 packets input, 245796282 bytes, 0 no buffer
     Received 0 broadcasts (6 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     3328442 packets output, 488073528 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out