10-18-2018 11:10 AM - edited 03-08-2019 04:25 PM
Dear All,
I am seeing lot of Input Errors, this is between LAN uplink of Router port GE 0/1 to Cisco Switch 2960 Gig 1/0/6, is this input errors and overrun is normal between the LAN uplink? Below configuration for reference, I am seeing lot disconnection between our office to our DataCenter, is this because of this input errors, overrun and unknown protocol drops
Router:-CISCO2911/K9
interface GigabitEthernet0/1
description Transit-VLAN
ip address 10.84.103.1 255.255.255.0
ip flow monitor NTAmon input
ip flow monitor NTAmon output
ip nat inside
ip virtual-reassembly in
zone-member security LAN
ip tcp adjust-mss 1300
ip policy route-map PBR
duplex auto
speed auto
MEA-IN-MUM-RT01#sh int gig 0/1
GigabitEthernet0/1 is up, line protocol is up
Hardware is CN Gigabit Ethernet, address is 442b.037f.f689 (bia 442b.037f.f689)
Description: Transit-VLAN
Internet address is 10.84.103.1/24
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 RJ45
output flow-control is unsupported, input flow-control is unsupported
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 09:24:40
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 114000 bits/sec, 75 packets/sec
5 minute output rate 154000 bits/sec, 65 packets/sec
9246658 packets input, 2364825917 bytes, 0 no buffer
Received 145082 broadcasts (7314 IP multicasts)
0 runts, 0 giants, 0 throttles
3054 input errors, 0 CRC, 0 frame, 3048 overrun, 0 ignored
0 watchdog, 9006 multicast, 0 pause input
7982324 packets output, 3342113006 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
1128 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
Switch : - WS-C2960S-48TS-L
interface GigabitEthernet1/0/6
description TRANSIT-LAN
switchport trunk allowed vlan 1,10,104
switchport mode trunk
no snmp trap link-status
GigabitEthernet1/0/6 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 1cde.a72d.a006 (bia 1cde.a72d.a006)
Description: TRANSIT-LAN
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, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:07, output 00:00:00, output hang never
Last clearing of "show interface" counters 09:22:42
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 152000 bits/sec, 61 packets/sec
5 minute output rate 112000 bits/sec, 71 packets/sec
7922713 packets input, 3350655625 bytes, 0 no buffer
Received 8760 broadcasts (8760 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 8760 multicast, 0 pause input
0 input packets with dribble condition detected
9285016 packets output, 2400017123 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
10-18-2018 11:31 AM
Hello,
--> ip tcp adjust-mss 1300
looks somewhat odd, what is that for ? Try and remove that line:
--> no ip tcp adjust-mss 1300
10-18-2018 11:41 AM
Hello
Are you using this interface as part of PPOE, if so try also to apply the ip mtu to the same size of the ip tcp adjust-mss
int fa0/0
ip tcp adjust-mss 1300
int dialer x
ip mtu 1300
10-18-2018 01:15 PM
Hi Paul,
No I am not using PPoE, it is LAN - LAN, the Switch and router port are connected as LAN, not in WAN. Please refer to my configuration in my original post
Thanks
10-19-2018 05:59 AM
10-20-2018 05:05 AM
Hi Joseph,
I will try changing the Flow control and let you know
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