Re: if input / output drops
- From: jvolter@xxxxxxxxx
- Date: 26 Apr 2007 18:55:52 -0700
On Apr 26, 7:47 pm, "hack.bac" <hack...@xxxxxxxxx> wrote:
Recently, an SNMP monitoring program has been displaying errors for my
backbone E1. When the link is saturated, downstream traffic gets
input / output packet drops.
Is it a smart thing to increase the hold-queue? or disable CEF?
Platform: Cisco7206VXR
Serial2/0 is up, line protocol is up
Hardware is 4ME1-BAL
Description: E1#1 8:1/2 i8
Internet address is 10.10.10.34/30
MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,
reliability 255/255, txload 92/255, rxload 42/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Restart-Delay is 0 secs
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 2w1d
Input queue: 0/75/0/15 (size/max/drops/flushes); Total output drops:
12266
Queueing strategy: weighted fair
Output queue: 1/1000/64/12266 (size/max total/threshold/drops)
Conversations 1/247/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1488 kilobits/sec
5 minute input rate 330000 bits/sec, 169 packets/sec
5 minute output rate 723000 bits/sec, 162 packets/sec
175347945 packets input, 1677577210 bytes, 0 no buffer
Received 151254 broadcasts, 0 runts, 0 giants, 0 throttles
862300 input errors, 861883 CRC, 0 frame, 7 overrun, 0 ignored,
410 abort
143679042 packets output, 2524635557 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions
0 alarm indications, 0 remote alarms, 0 rx LOF, 0 rx LOS
DCD up, BER inactive, NELR inactive, FELR inactive
Serial2/0 is up, line protocol is up
Internet address is 10.10.10.34/30
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Multicast reserved groups joined: 224.0.0.10
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is enabled
IP Flow switching is disabled
IP CEF switching is enabled
IP Feature Fast switching turbo vector
IP Feature CEF switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast, CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Probe proxy name replies are disabled
Policy routing is disabled
Network address translation is disabled
WCCP Redirect outbound is disabled
WCCP Redirect inbound is disabled
WCCP Redirect exclude is disabled
BGP Policy Mapping is disabled
IP multicast multilayer switching is disabled
Try to disable WFQ - use FIFO on high speed interfaces. increasing
hold queue should be your last resort.
.
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