×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Cisco 1801 802.1q tunked to Procurve 2810 dropping packets

Cisco 1801 802.1q tunked to Procurve 2810 dropping packets

Cisco 1801 802.1q tunked to Procurve 2810 dropping packets

(OP)
  Hello all, first time posting, so its for a Procurve 2810 something I don't deal with much.  We have an 1801 router connected to a 2810 using a vlan trunk.  Even though the port and device utilization is very low on both the 2810 and the 1801 the 2810 is dropping some of the routers packets.  speed and duplex both match, but regardless of which of two 2810's or router ports we try some of the traffic sent by the router is dropped at the switch.  The traffic dropped is not enough to break the connection, it just makes a very fast connection slow....we also try three different know good cables...

The configurations on both sides is very simple, there are two vlans both trunked across this connection.  All other switches connect back to this 2810 with vlan trunks that have no dropped packets carrying the same two vlans. The router routes both vlans and routes traffic to the firewall that routes traffic to the internet.

here are the basic configuration details
!
!
!1801
!
interface FastEthernet7
 description 2810 uplink int 47
 switchport mode trunk
!
!
interface Vlan12
 description VoIP
 ip address 192.168.9.1 255.255.255.0
 ip helper-address 10.99.88.8
!
interface Vlan14
 description data
 ip address 10.99.88.1 255.255.255.0
 ip helper-address 10.99.88.5
!
!
!
!
!2810
!
vlan 12
   name "VOIP"
   tagged 1-48
   voice
   exit
vlan 14
   name "Data"
   untagged 1-43
   ip address 10.99.88.2 255.255.255.0
   tagged 44-48
   exit



Here is the interface stats.  I cleared the stats and copied the output of both below.  


router#sh int f7                      
FastEthernet7 is up, line protocol is up
  Hardware is FastEthernet, address is 001d.70f9.8726 (bia 001d.70f9.8726)
  Description: 2810 uplink int 47
  MTU 1500 bytes, BW 100000 Kbit, 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
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output never, output hang never
  Last clearing of "show interface" counters 00:00:18
  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 5000 bits/sec, 8 packets/sec
  5 minute output rate 5000 bits/sec, 7 packets/sec
     141 packets input, 12039 bytes, 0 no buffer
     Received 49 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     153 packets output, 13254 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
router#

Switch# sh int 47

 Status and Counters - Port Counters for port 47                      

  Name  :                                                                 
  Link Status     : Up  
  Totals (Since boot or last clear) :                                    
   Bytes Rx        : 11,210             Bytes Tx        : 10,265            
   Unicast Rx      : 63                 Unicast Tx      : 49                
   Bcast/Mcast Rx  : 65                 Bcast/Mcast Tx  : 71                
  Errors (Since boot or last clear) :                                    
   FCS Rx          : 0                  Drops Rx        : 40                
   Alignment Rx    : 0                  Collisions Tx   : 0                 
   Runts Rx        : 0                  Late Colln Tx   : 0                 
   Giants Rx       : 0                  Excessive Colln : 0                 
   Total Rx Errors : 0                  Deferred Tx     : 0                 
  Rates (5 minute weighted average) :
   Total Rx  (bps) : 523104             Total Tx  (bps) : 523576    
   Unicast Rx (Pkts/sec) : 3            Unicast Tx (Pkts/sec) : 2         
   B/Mcast Rx (Pkts/sec) : 4            B/Mcast Tx (Pkts/sec) : 3         
   Utilization Rx  : 00.52 %            Utilization Tx  : 00.52 %


Switch#



These stats were copied about 25 minutes after clearing the stats and taking the above copy.

router#sh int f 7
FastEthernet7 is up, line protocol is up
  Hardware is FastEthernet, address is 001d.70f9.8726 (bia 001d.70f9.8726)
  Description: 2810 uplink int 47
  MTU 1500 bytes, BW 100000 Kbit, 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
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:01, output never, output hang never
  Last clearing of "show interface" counters 00:25:35
  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 7000 bits/sec, 10 packets/sec
  5 minute output rate 7000 bits/sec, 10 packets/sec
     31632 packets input, 20265980 bytes, 0 no buffer
     Received 7272 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     29813 packets output, 20147739 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
router#

Switch# sh int 47

 Status and Counters - Port Counters for port 47                      

  Name  :                                                                 
  Link Status     : Up  
  Totals (Since boot or last clear) :                                    
   Bytes Rx        : 20,147,665         Bytes Tx        : 20,265,980        
   Unicast Rx      : 23,475             Unicast Tx      : 21,755            
   Bcast/Mcast Rx  : 6337               Bcast/Mcast Tx  : 9877              
  Errors (Since boot or last clear) :                                    
   FCS Rx          : 0                  Drops Rx        : 3840              
   Alignment Rx    : 0                  Collisions Tx   : 0                 
   Runts Rx        : 0                  Late Colln Tx   : 0                 
   Giants Rx       : 0                  Excessive Colln : 0                 
   Total Rx Errors : 0                  Deferred Tx     : 0                 
  Rates (5 minute weighted average) :
   Total Rx  (bps) : 515160             Total Tx  (bps) : 515952    
   Unicast Rx (Pkts/sec) : 5            Unicast Tx (Pkts/sec) : 4         
   B/Mcast Rx (Pkts/sec) : 4            B/Mcast Tx (Pkts/sec) : 6         
   Utilization Rx  : 00.51 %            Utilization Tx  : 00.51 %


Switch#





cpu utilization

router#
router#sh proc cpu hist

router   01:20:10 AM Sunday Oct 4 2009 EDT

                                                                
                                                                
    888                                                       66
100                                                             
 90                                                             
 80                                                             
 70                                                             
 60                                                             
 50                                                             
 40                                                             
 30                                                             
 20                                                             
 10 ***                                                       **
   0....5....1....1....2....2....3....3....4....4....5....5....6
             0    5    0    5    0    5    0    5    0    5    0
               CPU% per second (last 60 seconds)

                                                                
                               7 6                2 4           
    868859988688959788789898845182874688878878888868558888848888
100                                                             
 90                                                             
 80                                                             
 70                            *                                
 60                            * *                              
 50                            * *                  *           
 40                            * *                  *           
 30                            * *                * *           
 20                            * *                * *           
 10 ************************* *#*#** ***************#****** ****
   0....5....1....1....2....2....3....3....4....4....5....5....6
             0    5    0    5    0    5    0    5    0    5    0
               CPU% per minute (last 60 minutes)
              * = maximum CPU%   # = average CPU%
          
                                                                            
    262266724232122211222222322222221323222112222322123222232222122232132321
    841576646393450469994338155412015500211864225093520211667802798008905236
100                                                                         
 90                                                                         
 80       *                                                                 
 70     ***                                                                 
 60  *  ***                                                                 
 50  *  *** *                                                               
 40  *  *** * *                      *                     *                
 30 ** **** * *  *    **   ****      * *        ***   *   ****   ** ** ***  
 20 ************ ***********************************************************
 10 ************************************************************************
   0....5....1....1....2....2....3....3....4....4....5....5....6....6....7..
             0    5    0    5    0    5    0    5    0    5    0    5    0  
                   CPU% per hour (last 72 hours)
                  * = maximum CPU%   # = average CPU%

router#  

Switch# sh cpu

10 percent busy, from 5736 sec ago
1 sec ave: 12 percent busy
5 sec ave: 11 percent busy
1 min ave: 10 percent busy

Switch#  

RE: Cisco 1801 802.1q tunked to Procurve 2810 dropping packets

try to reboot the switch and see if there are any differences. also, look in the logs of the hp to see if there are any "high collisions or drop rate" errors. Based on your statistics the amount of drops in comparison to overall traffic volume is around 2% which depending on network utilization may or may not be too high. you also need to understand that in a ROAS configuration, having a single uplink moving all of your inter-vlan traffic is the number one congestion point.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

RE: Cisco 1801 802.1q tunked to Procurve 2810 dropping packets

(OP)

  Well before I saw this I had already started downloading the code upgrade.  So after going from 11.06 to 11.15 and rebooting the switch to dropping has stopped.  Thanks for your help!!!!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close