Router CISCO2811 replacemnet

[MC20]

Hi all,

we have CISCO2811 router up and running and routing 4 networks, but for security reasons we bring second one for swap replacement spare part.

Point was to copy IOS image and configs from old one to new one and in case of failure quickly replace them. But when we copy config to new one and swap it than it is not routing between networks anymore.

I started experimetning with it, done factory reset and tried simple routing between two networks represented by two laptops and it is not routing. I am able to ping from router all interfaces and devices on each network and i can ping router from each network, but routing between vlans does not work.

Also if i run command "ip routing" it does not apear in running config, not sure if it should beacause it is not in old config also.

The new router is same type and revision, not brand new but came as second hand. Previous use was in some german bank as i know and it was working.

IOS version is 12.4.

Thanks for any sugestions

[balaji.bandi]

Some command in the router prob enabled by default and hidden in the config, you can view show run all to view config.

can you make small network diagram for us to undertand and post the config removing confidential information.

if the exiting router working, the new one should work as expected, if all the config accepted.

Other suggestion, you can introduce other router in to network and build a  config auto fail over between routers if one fails, rather physical intervention, is this something work for you ?

[MC20]

Thanks, i am currently out of office so i will post network diagram and config tomorrow.

And that is exactly strange to me why it is not working, because i copy config from old router to flash and than from flash to new one, not with running config and than send it to new one through terminal.

Than, just to verify, i export it from new one again and compare it and it was exactly same as original. For old router it work and for new one does not.

Unfortunetly redundant router is not posible, new router will be as spare part only.

[balaji.bandi]

how about setup the new device - copy the running config to notepad and tweak the config what is not required and paste ? is that works ?

some time config may be ignoring (may be)

post the config to understand better old and new.

[Georg Pauwen]

Hello,

how old is the router ? Considering the IOS you are running (12.4) probably > 10 years ?

What IOS version are you running on both routers ? Post the output of:

sh ver

of both routers.

[MC20]

Hi,

i do not have information how exactly old they are but both will be ancient, i checked labels on both and the have same revision.

New one came without flash so i bought new flash for it and copy IOS image from old one so IOS version is same.

I checked logs from putty and it is

Version 12.4(13r)T11, RELEASE SOFTWARE (fc1)

[Julio E. Moisa]

Hi,

If it is the same model and IOS no problem should arise, you could try swapping the compact flash to discard any problem with the IOS or use other compact flash (recommended), an image upgrade is recommend if you can get the image.

Also what you see running the following command: show ip protocol

Regards.

[MC20]

Hi guys,

i have new router in office connected to simple network like this

and running configuration as this

Router#show run
Building configuration...

Current configuration : 1103 bytes
!
version 12.4
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
!
!
ip cef
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
!
!
!
!
! 
!
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/3/0
!
interface FastEthernet0/3/1
 switchport access vlan 4
!
interface FastEthernet0/3/2
!
interface FastEthernet0/3/3
 switchport access vlan 7
!
interface FastEthernet0/3/4
!
interface FastEthernet0/3/5
!
interface FastEthernet0/3/6
!
interface FastEthernet0/3/7
!
interface FastEthernet0/3/8
!
interface Vlan1
 no ip address
!
interface Vlan4
 ip address 192.168.4.1 255.255.255.0
!
interface Vlan7
 ip address 192.168.7.1 255.255.255.0
!
ip forward-protocol nd
!
ip http server
no ip http secure-server
!
!
!
control-plane
!
!
!
line con 0
 length 0
line aux 0
line vty 0 4
 login
!
scheduler allocate 20000 1000
!
end

At this state i am able to ping from laptop 1 ips 192.168.4.1 and 192.168.7.1 but not 192.168.7.201 and same for laptop 2 in oposite way.

Show ip route gives:

Router#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

C    192.168.4.0/24 is directly connected, Vlan4
C    192.168.7.0/24 is directly connected, Vlan7

Show ip protocol gives nothing

Interfaces status and summary

Router#show interfaces status

Port    Name               Status       Vlan       Duplex Speed Type
Fa0/3/0                    notconnect   1            auto    auto 10/100BaseTX
Fa0/3/1                    connected    4          a-full   a-100 10/100BaseTX
Fa0/3/2                    notconnect   1            auto    auto 10/100BaseTX
Fa0/3/3                    connected    7          a-full   a-100 10/100BaseTX
Fa0/3/4                    notconnect   1            auto    auto 10/100BaseTX
Fa0/3/5                    notconnect   1            auto    auto 10/100BaseTX
Fa0/3/6                    notconnect   1            auto    auto 10/100BaseTX
Fa0/3/7                    notconnect   1            auto    auto 10/100BaseTX
Fa0/3/8                    notconnect   1            auto    auto 10/100BaseTX

Router#show interfaces summary

 *: 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
------------------------------------------------------------------------
  FastEthernet0/0          0     0    0     0     0    0     0    0    0
  FastEthernet0/1          0     0    0     0     0    0     0    0    0
  FastEthernet0/3/0        0     0    0     0     0    0     0    0    0
* FastEthernet0/3/1        0     0    0     0     0    0     0    0    0
  FastEthernet0/3/2        0     0    0     0     0    0     0    0    0
* FastEthernet0/3/3        0     0    0     0     0    0     0    0    0
  FastEthernet0/3/4        0     0    0     0     0    0     0    0    0
  FastEthernet0/3/5        0     0    0     0     0    0     0    0    0
  FastEthernet0/3/6        0     0    0     0     0    0     0    0    0
  FastEthernet0/3/7        0     0    0     0     0    0     0    0    0
  FastEthernet0/3/8        0     0    0     0     0    0     0    0    0
  Vlan1                    0     0    0     0     0    0     0    0    0
* Vlan4                    0     0    0     2     0    0     0    0    0
* Vlan7                    0     0    0     2     0    0     0    0    0
Router#