07-22-2012 04:44 AM - edited 03-07-2019 07:54 AM
Dear Friends,
I have a wi-fi network setup
using devices are
1. cisco_,2950 to manage vlans,
2. pms server for billing and getting login page.
3. nomadix for gateway
this setup is in single rack only
My main switch (2950) having vlans 118, 109 and 40.
vlans 118, 109 are public vlans, which are comming from ISP and those are for direct internet.
and vlan 40 is local vlan to get the authentication page for intenet (40 local vlan)
every thing is working fine and
I am getting the crc error message in switch_2950's 17th and 20th ports,
17th port is connected to momadix lan port with patch card, allowed vlan is 40
20th port is connected to nomadix wan port with patch card, allowed vlan is 118
Note:-
Here i am using single switch cisco_2950 for wan (Vlans 109, 118) and lan (Vlan 40)
It means nomadix wan port is connected from cisco_2950's 20th (for wan) port and nomadix lan port is connected to again
Cisco_2950's 17th (for local) port.
and for better understanding plz find the switch config and connectivity diagram
My suspect is I am using two networks (wan, local) for same switch, due to this reason these errors are comming?
User Access Verification
Password:
Password:
NVVB_MAINSWITCH_2950>en
Password:
NVVB_MAINSWITCH_2950#sh run
Building configuration...
Current configuration : 3407 bytes
!
! Last configuration change at 09:08:35 UTC Fri Jul 13 2012
! NVRAM config last updated at 12:25:08 UTC Fri Jun 29 2012
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log datetime
service password-encryption
service sequence-numbers
!
hostname NVVB_MAINSWITCH_2950
!
enable secret 5 xxxxxxxxxxxx
!
ip subnet-zero
!
no ip domain-lookup
vtp mode transparent
!
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
!
!
!
!
vlan 40,109,118
!
interface FastEthernet0/1
description # UP LINK TO LEVEL-0 #
switchport trunk allowed vlan 40,118
switchport mode trunk
!
interface FastEthernet0/2
description # UP LINK TO LEVEL-2 #
switchport trunk allowed vlan 40,118
switchport mode trunk
!
interface FastEthernet0/3
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/4
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/5
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/6
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/7
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/8
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/9
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/10
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/11
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/12
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/13
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/14
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/15
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/16
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/17
description ### CONNECTED TO NOMADIX LAN ###
switchport access vlan 40
switchport mode access
!
interface FastEthernet0/18
switchport access vlan 118
switchport mode access
!
interface FastEthernet0/19
description ### CONNECTED TO PMS SERVER ###
switchport access vlan 118
switchport mode access
!
interface FastEthernet0/20
description ### CONNECTED TO NOMADIX WAN ###
switchport access vlan 118
switchport mode access
!
interface FastEthernet0/21
switchport access vlan 109
switchport mode access
!
interface FastEthernet0/22
description # CONNECTED TO ADMIN-I #
switchport access vlan 109
switchport mode access
!
interface FastEthernet0/23
description # CONNECTED TO ADMIN-II #
switchport access vlan 109
switchport mode access
!
interface FastEthernet0/24
description ### Vlan 109,118 - P2P connected to PRPuram BS ###
switchport trunk allowed vlan 109,118
switchport mode trunk
!
interface GigabitEthernet0/1
switchport trunk allowed vlan 40,118
switchport mode trunk
!
interface GigabitEthernet0/2
description ### CONNECTED TO 3750 ###
switchport trunk allowed vlan 40,118
switchport mode trunk
!
interface Vlan1
no ip address
no ip route-cache
shutdown
!
interface Vlan109
ip address 115.x.x.x 255.255.255.240
no ip route-cache
!
ip default-gateway 115.x.x.x
ip http server
snmp-server community public RO
!
line con 0
line vty 0 4
password 7 1506080517260B3321353C
login
line vty 5 15
password 7xxxxxxxxx
login
!
!
end
NVVB_MAINSWITCH_2950#
07-22-2012 04:46 AM
Post the output to the commands:
1. sh interface
2. sh controll e
07-22-2012 04:59 AM
Hi Leolaohoo,
Thanks for quic reply and i dont think problem with phycical layer, is there any problem by using 2notwork in same switch, as i menctioned above.
NVVB_MAINSWITCH_2950#sh int f0/17
FastEthernet0/17 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0012.0147.8991 (bia 0012.0147.8991)
Description: ### CONNECTED TO NOMADIX LAN ###
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, media type is 100BaseTX
input flow-control is unsupported output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:00, output hang never
Last clearing of "show interface" counters 03:24:18
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 731000 bits/sec, 66 packets/sec
5 minute output rate 39000 bits/sec, 46 packets/sec
1538814 packets input, 1795079229 bytes, 0 no buffer
Received 5 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
86 input errors, 86 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
1123088 packets output, 172027332 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 PAUSE output
0 output buffer failures, 0 output buffers swapped out
NVVB_MAINSWITCH_2950#sh controllers e f0/17
Transmit Receive
173014423 Bytes 1812880179 Bytes
1132242 Frames 1552712 Frames
18388 Multicast frames 86 FCS errors
7750 Broadcast frames 0 Multicast frames
0 Pause frames 5 Broadcast frames
0 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
0 1 collision frames 0 Unknown opcode frames
0 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
0 Total collisions 0 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 0 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 0 Discarded frames
Transmit and Receive
405097 Minimum size frames
815073 65 to 127 byte frames
95277 128 to 255 byte frames
54063 256 to 511 byte frames
45878 512 to 1023 byte frames
1269566 1024 to 1518 byte frames
0 1519 to 1522 byte frames
NVVB_MAINSWITCH_2950#
NVVB_MAINSWITCH_2950#sh int f0/20
FastEthernet0/20 is up, line protocol is up (connected)
Hardware is Fast Ethernet, address is 0012.0147.8994 (bia 0012.0147.8994)
Description: ### CONNECTED TO NOMADIX WAN ###
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 2/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is 100BaseTX
input flow-control is unsupported output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, output hang never
Last clearing of "show interface" counters 03:26:32
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 61000 bits/sec, 62 packets/sec
5 minute output rate 981000 bits/sec, 91 packets/sec
1113631 packets input, 172645481 bytes, 0 no buffer
Received 154 broadcasts (0 multicast)
0 runts, 0 giants, 0 throttles
9 input errors, 9 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
1577914 packets output, 1823525176 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 PAUSE output
0 output buffer failures, 0 output buffers swapped out
NVVB_MAINSWITCH_2950#
NVVB_MAINSWITCH_2950#sh controllers e f0/20
Transmit Receive
1823388154 Bytes 172433955 Bytes
1577229 Frames 1112999 Frames
6520 Multicast frames 9 FCS errors
293 Broadcast frames 0 Multicast frames
0 Pause frames 154 Broadcast frames
0 Single defer frames 0 Control frames
0 Multiple defer frames 0 Pause frames
0 1 collision frames 0 Unknown opcode frames
0 2-15 collisions 0 Alignment errors
0 Late collisions 0 Length out of range
0 Excessive collisions 0 Symbol error frames
0 Total collisions 0 False carrier errors
0 Control frames 0 Valid frames, too small
0 VLAN discard frames 0 Valid frames, too large
0 Too old frames 0 Invalid frames, too small
0 Tagged frames 0 Invalid frames, too large
0 Aborted Tx frames 0 Discarded frames
Transmit and Receive
397036 Minimum size frames
810176 65 to 127 byte frames
108030 128 to 255 byte frames
54510 256 to 511 byte frames
45067 512 to 1023 byte frames
1275409 1024 to 1518 byte frames
0 1519 to 1522 byte frames
NVVB_MAINSWITCH_2950#
07-22-2012 03:07 PM
Your "line errors" are not caused by duplex mismatch (which is good).
Instead, the line errors are caused by FCS (Frame Check Sequence). This is bad.
There could be a possibility that you are looking at a potential cable fault.
07-22-2012 11:01 PM
Hi Leolaohoo,
Thank u very much, now i changed the both patch cards (17th, 20th ports of cisco 2950).
kept it on observation.
could you expline me what type of errors will occur in phycical layer and
when below error will occer
crc errers
fcs errors
Symbol error frames
Alignment errors
False carrier errors
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