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Interface protocol stays down (Cisco 3845-NB)

astevenson93
Level 1
Level 1

Hello,

I have run into a bit of a problem with a new Ebay purchase. I cannot get one of the Gig interfaces (Gi0/0) to come up. I have cleared all config from the router and checked everything I can think of... Gi0/1 will come up and work with the same configuration & cabling so I suspect it may be a hardware fault with the port.

 I have attached some logs:

Cisco 3845 (revision 1.0) with 485376K/38912K bytes of memory.

Processor board ID FCZ111772AE
2 Gigabit Ethernet interfaces
8 Low-speed serial(sync/async) interfaces
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity enabled.
479K bytes of NVRAM.
126976K bytes of ATA System CompactFlash (Read/Write)

----------------------------------

Router>show ip int g0/0
GigabitEthernet0/0 is up, line protocol is down
Internet address is 192.168.100.150/24
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
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 disabled
IP Flow switching is disabled
IP CEF switching is enabled
IP 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
Policy routing is disabled
Network address translation is disabled
BGP Policy Mapping is disabled
Input features: MCI Check
WCCP Redirect outbound is disabled
WCCP Redirect inbound is disabled
WCCP Redirect exclude is disabled

----------------------------------------

Router>show ip int brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 192.168.100.150 YES NVRAM up down
GigabitEthernet0/1 192.168.200.150 YES NVRAM up up
Serial1/0 unassigned YES NVRAM administratively down down
Serial1/1 unassigned YES NVRAM administratively down down
Serial1/2 unassigned YES NVRAM administratively down down
Serial1/3 unassigned YES NVRAM administratively down down
Serial1/4 unassigned YES NVRAM administratively down down
Serial1/5 unassigned YES NVRAM administratively down down
Serial1/6 unassigned YES NVRAM administratively down down
Serial1/7 unassigned YES NVRAM administratively down down

-----------------------------------------

Router#show run
Building configuration...


Current configuration : 1385 bytes
!
! Last configuration change at 22:00:46 UTC Thu Feb 18 2016
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
dot11 syslog
ip source-route
!
ip cef
!
!
!
!
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
voice-card 0
!
!
!
!
!
!
!
crypto pki token default removal timeout 0
!
!
!
!
license udi pid CISCO3845-MB sn FOC10113YWY
!
redundancy
!
!
!
!
!
!
!
!
!
!
interface GigabitEthernet0/0
ip address 192.168.100.150 255.255.255.0
duplex auto
speed auto
media-type rj45
!
interface GigabitEthernet0/1
ip address 192.168.200.150 255.255.255.0
duplex auto
speed auto
media-type rj45
!
interface Serial1/0
no ip address
shutdown
no fair-queue
!
interface Serial1/1
no ip address
shutdown
!
interface Serial1/2
no ip address
shutdown
!
interface Serial1/3
no ip address
shutdown
!

---------------------------------------------------


*Feb 18 22:42:12.511: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State changed to: Initialized
*Feb 18 22:42:12.515: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State changed to: Enabled
*Feb 18 22:42:14.143: %LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to reset
*Feb 18 22:42:14.143: %LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to reset
*Feb 18 22:42:14.143: %LINEPROTO-5-UPDOWN: Line protocol on Interface VoIP-Null0, changed state to up
*Feb 18 22:42:14.147: %LINK-3-UPDOWN: Interface Serial1/0, changed state to down
*Feb 18 22:42:14.147: %LINK-3-UPDOWN: Interface Serial1/1, changed state to down
*Feb 18 22:42:14.147: %LINK-3-UPDOWN: Interface Serial1/2, changed state to down
*Feb 18 22:42:14.147: %LINK-3-UPDOWN: Interface Serial1/3, changed state to down
*Feb 18 22:42:14.147: %LINK-3-UPDOWN: Interface Serial1/4, changed state to down
*Feb 18 22:42:14.147: %LINK-3-UPDOWN: Interface Serial1/5, changed state to down
*Feb 18 22:42:14.147: %LINK-3-UPDOWN: Interface Serial1/6, changed state to down
*Feb 18 22:42:14.147: %LINK-3-UPDOWN: Interface Serial1/7, changed state to down
*Feb 18 22:42:14.147: %LINEPROTO-5-UPDOWN: Line protocol on Interface Onboard VPN, changed state to up
*Feb 18 22:42:15.143: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to down
*Feb 18 22:42:15.143: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down
*Feb 18 22:42:15.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down
*Feb 18 22:42:15.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/1, changed state to down
*Feb 18 22:42:15.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/2, changed state to down
*Feb 18 22:42:15.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/3, changed state to down
*Feb 18 22:42:15.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/4, changed state to down
*Feb 18 22:42:15.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/5, changed state to down
*Feb 18 22:42:15.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/6, changed state to down
*Feb 18 22:42:15.343: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/7, changed state to down
*Feb 18 22:42:16.147: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Feb 18 22:42:16.147: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up
*Feb 18 22:43:15.775: %IP-5-WEBINST_KILL: Terminating DNS process
*Feb 18 22:43:17.471: %LINK-5-CHANGED: Interface Serial1/0, changed state to administratively down
*Feb 18 22:43:17.475: %LINK-5-CHANGED: Interface GigabitEthernet0/0, changed state to administratively down
*Feb 18 22:43:17.491: %LINK-5-CHANGED: Interface GigabitEthernet0/1, changed state to administratively down
*Feb 18 22:43:17.503: %LINK-5-CHANGED: Interface Serial1/1, changed state to administratively down
*Feb 18 22:43:17.503: %LINK-5-CHANGED: Interface Serial1/2, changed state to administratively down
*Feb 18 22:43:17.507: %LINK-5-CHANGED: Interface Serial1/3, changed state to administratively down
*Feb 18 22:43:17.507: %LINK-5-CHANGED: Interface Serial1/4, changed state to administratively down
*Feb 18 22:43:17.507: %LINK-5-CHANGED: Interface Serial1/5, changed state to administratively down
*Feb 18 22:43:17.507: %LINK-5-CHANGED: Interface Serial1/6, changed state to administratively down
*Feb 18 22:43:17.511: %LINK-5-CHANGED: Interface Serial1/7, changed state to administratively down
*Feb 18 22:43:31.115: %SYS-5-RESTART: System restarted --
Cisco IOS Software, 3800 Software (C3845-ADVENTERPRISEK9-M), Version 15.1(4)M9, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Fri 12-Sep-14 11:57 by prod_rel_team
*Feb 18 22:43:31.119: %SNMP-5-COLDSTART: SNMP agent on host Router is undergoing a cold start
*Feb 18 22:43:31.275: %SYS-6-BOOTTIME: Time taken to reboot after reload = 207 seconds
*Feb 18 22:43:31.447: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF
*Feb 18 22:43:31.447: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF
*Feb 18 22:43:31.447: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF
*Feb 18 22:43:31.447: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF

Any help would be much appreciated.

2 Replies 2

rosannle
Cisco Employee
Cisco Employee

Hello,

Have you looked at the output for “show interface g0/0” (without the “ip”)?

Here are some errors to look for:

  • Late collisions - that’s usually a sign of a faulty port
  • In/output error – bad cabling, faulty interface hardware, duplex mismatch
  • Dropped packets – faulty hardware, cable

Since both interfaces are configured the same, and your router G0/0 does not come up (status/protocol remains up/down) with the same connection to a device and port that G0/1 can connect with (status/protocol: up/up), I think it’s safe to assume that the problem lies on G0/0 of your router.

 

-Rosanne

pwwiddicombe
Level 4
Level 4

Does the Gi 0/0 in this router have the SFP slot beside it, and is that populated?  I see you have the config line specifying the RJ45, but there could be a side-effect if you happen to have an unused fiber SFP in that slot.