Cisco 831 no vlan tagging

Akiii

Hi,

Just grabbed a cheap 831 from ebay, and I just realized that there's no such thing as vlan in it. Checked the feature navigate but it seems that I'm doomed. So basically I can throw this out of the window if I want vlan?

thnks

alan2308

Akiii wrote: »

Hi,

Just grabbed a cheap 831 from ebay, and I just realized that there's no such thing as vlan in it. Checked the feature navigate but it seems that I'm doomed. So basically I can throw this out of the window if I want vlan?

thnks

Yea, pretty much. They're EOL'ed, so its pretty much WYSIWYG at this point with those.

However, I see that they're going for $20 and they can run IOS 12.4 IP/FW/PLUS 3DES and they support SDM. It's definitely something I'll be keeping in mind when I move on to CCNA:Security since I don't have any SDM capable routers right now.

Akiii

alan2308 wrote: »

Yea, pretty much. They're EOL'ed, so its pretty much WYSIWYG at this point with those.

However, I see that they're going for $20 and they can run IOS 12.4 IP/FW/PLUS 3DES and they support SDM. It's definitely something I'll be keeping in mind when I move on to CCNA:Security since I don't have any SDM capable routers right now.

Ok thanks, just PM one you get there.

1 more thing, has anyone know what can be the problem with the following config? I'm trying to setup my 831 through a cable modem but it doesn't want to work. Maybe I'm just tired and need to look into this tomorrow :P

Cisco#sh run
Building configuration...

Current configuration : 2701 bytes
!
version 12.3
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
!
hostname Cisco
!
security authentication failure rate 3 log
security passwords min-length 6
logging buffered 51200 debugging
logging console critical
!

username Admin privilege 15 secret 5 $1$GgSK$FSnAGJKxIlVER89cSbZvA1
no aaa new-model
ip subnet-zero
no ip source-route
ip tcp synwait-time 10
no ip domain lookup
ip domain name yourdomain.com
ip dhcp excluded-address 10.10.10.1
!
!
ip dhcp pool sdm-pool1
import all
network 10.10.10.0 255.255.255.0
default-router 10.10.10.1
!
!
no ip bootp server
ip cef
ip audit notify log
ip audit po max-events 100
ip ssh time-out 60
ip ssh authentication-retries 2
no ftp-server write-enable
!
!
!
!
!
!
!
interface Ethernet0
description $ETH-LAN$$ETH-SW-LAUNCH$$INTF-INFO-Ethernet 10/100$$ES_LAN$$FW_INSIDE$
ip address 10.10.10.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat inside
ip route-cache flow
shutdown
no cdp enable
!
interface Ethernet1
description $ES_WAN$$FW_OUTSIDE$
ip address dhcp client-id Ethernet1
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip route-cache flow
duplex auto
no cdp enable
!
interface FastEthernet1
no ip address
duplex auto
speed auto
!
interface FastEthernet2
no ip address
duplex auto
speed auto
!
interface FastEthernet3
no ip address
duplex auto
speed auto
!
interface FastEthernet4
no ip address
duplex auto
speed auto
!
ip nat inside source list 1 interface Ethernet1 overload
ip classless
ip http server
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
logging trap debugging
access-list 1 remark INSIDE_IF=Ethernet0
access-list 1 remark SDM_ACL Category=2
access-list 1 permit 10.10.10.0 0.0.0.255
no cdp run
banner login ^CAuthorized access only!
Disconnect IMMEDIATELY if you are not an authorized user!^C
!
line con 0
exec-timeout 3 30
logging synchronous
login local
no modem enable
transport output telnet
line aux 0
login local
transport output telnet
line vty 0 4
privilege level 15
login local
transport input telnet ssh
!
scheduler max-task-time 5000
scheduler interval 500
!

burbankmarc

Your config looks ok. Are you not able to pull a DHCP request? Does the interface come up when you plug it in?

Remember you gotta unplug your modem for about 30 seconds before you plug a new device into it, so it clears it's MAC association.

Akiii

burbankmarc wrote: »

Your config looks ok. Are you not able to pull a DHCP request? Does the interface come up when you plug it in?

Remember you gotta unplug your modem for about 30 seconds before you plug a new device into it, so it clears it's MAC association.

The interfaces are working with up and up, so I believe there's something wrong with that dhcp and I've just reseted the modem but same issue.

burbankmarc

weird, maybe it doesn't like your client id, remove that and just use the generic. if all else fails you can always call your ISP, sometimes they have to manually clear the MAC association

Akiii

burbankmarc wrote: »

weird, maybe it doesn't like your client id, remove that and just use the generic. if all else fails you can always call your ISP, sometimes they have to manually clear the MAC association

thanks its working now, I just had to reboot the modem once again (hurray)

Is that normal if I see 4 fa ports and 2 eth ports in the cli, while there's only 1 eth? Maybe some ios glitch?

alan2308

Akiii wrote: »

thanks its working now, I just had to reboot the modem once again (hurray)

Is that normal if I see 4 fa ports and 2 eth ports in the cli, while there's only 1 eth? Maybe some ios glitch?

One may be the internal interface connecting the router and switch.

Akiii

alan2308 wrote: »

One may be the internal interface connecting the router and switch.

Wich interface do you mean by that?

alan2308

Akiii wrote: »

Wich interface do you mean by that?

One of the two eth ports.

Akiii

alan2308 wrote: »

One of the two eth ports.

Sorry I feel a little bit confused here.

Cisco 830 Series Secure Broadband Routers [Cisco 800 Series Routers] - Cisco Systems

There's 1 console 1 ethernet and 4 fasthernet

and I'm wondering why does it show 2 ethernet in the int brief?

tiersten

It is what alan2308 said.

Ethernet0 is the LAN side of the router and it is internally connected to the 4 port Fast Ethernet switch. The switch in a 831 is a basic managed switch which only allows you to set speed and duplex.
Ethernet1 is the WAN side of the router.

alan2308

Let me try to expand a little bit more Akiii.

There are two separate devices in the Cisco 831, a router and a switch. They just happen to be shoved into the same physical box. These two devices are connected by an Ethernet interface. It's all internal, so you don't see an additional physical RJ-45 connector for this interface. Here's a quick drawing, maybe it'll help. The FastEthernet interfaces are numbered wrong, but you get the idea.

tiersten

I'm in awe of your drawing! But yeah. Thats much better than a text only explanation

Akiii

ok thanks guys finally got it