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I agree it is probably T1.<br />
You should examine its usage, &nbsp;graph the traffic, and see if it is approaching or near capacity when drops are occuring.<br />
<br />
<br />
Do you have QOS configured on the 2610? &nbsp;If not, you may need it, if important traffic is seeing degraded performance, depending on what the other traffic is..<br />
<br />
If the traffic generating high usage is important time-sensitive traffic, then you may need more bandwidth available.
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<div>
You might also try enabling flowcontrol on the 2610.
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<div>
I would enable WRED on the serial interface instead of tail-dropping under congestion. &nbsp;This should help lower the drops. &nbsp;But ultimately, you probably need to add more bandwidth.<br />
<br />
conf t<br />
int s0/0<br />
random-detect<br />
<br />
Be aware that the interface could bounce when enabling WRED on the interface.
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<div class="content wysiwyg-content">
We are seeing bursts of dropped packets on the output queue of a 2610.<br />
<br />
The 2610 is connected to a T1 with a WIC-1DSU-T1 and has a single ethernet interface on the inside. &nbsp;I am concerned about the high OQD. &nbsp;Is this a capacity issue on the 2610?<br />
<br />
PVLRTR#show interf s0/0 summ<br />
<br />
&nbsp;*: interface is up<br />
&nbsp;IHQ: pkts in input hold queue &nbsp; &nbsp; IQD: pkts dropped from input queue<br />
&nbsp;OHQ: pkts in output hold queue &nbsp; &nbsp;OQD: pkts dropped from output queue<br />
&nbsp;RXBS: rx rate (bits/sec) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;RXPS: rx rate (pkts/sec)<br />
&nbsp;TXBS: tx rate (bits/sec) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;TXPS: tx rate (pkts/sec)<br />
&nbsp;TRTL: throttle count<br />
<br />
&nbsp; Interface &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;IHQ &nbsp; IQD &nbsp;OHQ &nbsp; OQD &nbsp;RXBS RXPS &nbsp;TXBS TXPS TRTL<br />
--------------------------<wbr />----------<wbr />----------<wbr />----------<wbr />----------<wbr />------<br />
* Serial0/0 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;0 &nbsp; &nbsp; 0 &nbsp; &nbsp;0 31410 240000 &nbsp;128 142000 &nbsp;133 &nbsp; &nbsp;0<br />
NOTE:No separate counters are maintained for subinterfaces<br />
&nbsp; &nbsp; &nbsp;Hence Details of subinterface are not shown<br />

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We are seeing bursts of dropped packets on the output queue of a 2610.

The 2610 is connected to a T1 with a WIC-1DSU-T1 and has a single ethernet interface on the inside.  I am concerned about the high OQD.  Is this a capacity issue on the 2610?

PVLRTR#show interf s0/0 summ

 *: interface is up
 IHQ: pkts in input hold queue     IQD: pkts dropped from input queue
 OHQ: pkts in output hold queue    OQD: pkts dropped from output queue
 RXBS: rx rate (bits/sec)          RXPS: rx rate (pkts/sec)
 TXBS: tx rate (bits/sec)          TXPS: tx rate (pkts/sec)
 TRTL: throttle count

  Interface              IHQ   IQD  OHQ   OQD  RXBS RXPS  TXBS TXPS TRTL
------------------------------------------------------------------------
* Serial0/0                0     0    0 31410 240000  128 142000  133    0
NOTE:No separate counters are maintained for subinterfaces
     Hence Details of subinterface are not shown


Cisco 2610 showing packets dropped from output queue

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.