08-01-2006 08:40 AM - edited 03-03-2019 01:31 PM
Hi, I've searched for a router that supports a connection through en ADSL. so I've choosed the 837 model. (If any other propositions, they are wellcome) How many interfaces has the 837 model. I wont to configure the router that it connects to Internet via the ADSL, and on the other side that I have 2 LAN or a LAN and DMZ. So it has a public IP, IP1-100.100.10.1, IP2-192.168.1.1. So i can forward som ports from the publis IP to the IP1. In this case my IP1 is the DMZ zone, IP2 the LAN. Is it possible to do this with this model? I've seen that it has four port manageable switch, but i didn't find the in the specification can it have 2 interfaces to cofigure them separately like:
interface Ethernet0
ip address 192.168.0.1 255.255.255.0
ip nat inside
!
interface Ethernet1
ip address 100.100.10.200 255.255.255.0
ip nat inside
!
Here is a picture of what i want do do, in case i was not clean... Sorry for my bad Englis too...
Thanks a lot!
08-01-2006 10:44 AM
dont think this is possible since there is only 1 routed ethernet interface on the device. the other ethernet interfaces are switched only.
see this link for more 837 config info:
08-01-2006 12:03 PM
I would suggest going with a higher line 870 series router. With the 870's, you can create multiple VLAN's and routed VLAN interfaces. With an 870 series, you'll be able to do what is indicated in the diagram. You cannot do this with an 837.
http://www.cisco.com/en/US/products/hw/routers/ps380/products_data_sheet0900aecd8028a976.html
08-04-2006 05:40 AM
Hi, Thanks a lot of you two...
Ok, I'll see the propositions you've made me.
But why in the 837 data sheet in table 1, features it is written:
Demilitarized Zone Port (DMZ) : One of the switch ports could be convertsed in to a DMZ port to place publicly accessible servers or to segregate users on the LAN.
Data sheet:
Thanks again!
Momchil
08-07-2006 07:13 PM
The 837's switch is, um, partially managed. You can set up a DMZ port by configuring special interface ethernet2, which separates switch port 1 out into a routable DMZ interface (ethernet0 is the aggregate switch interface.) However, there are some limitations on throughput which I can't remember the details of; you may want to search cisco.com for "837 dmz".
Regards,
Jonathan
08-07-2006 11:55 PM
Thanks a lot for the explication about the 837. T think the best solution for me is the 877 which is also the newer version of 837.
Regards Momchil
08-04-2006 07:24 AM
I saw into the Q&A that the Cisco 870 series are fixed-configuration routers? What does it means?
08-04-2006 02:31 PM
It means that there are no interchangeable interfaces, or modular interfaces. Whatever model of 800 series that you buy will come only with the interfaces that you buy it with, and you cannot add/remove.
08-07-2006 11:32 PM
Thank for your help about the cisco's 800, it was helpful for me!
It was really not hard to understand, but...
Regards Momchil
08-08-2006 04:54 AM
Hi,
We have loads of 877 ADSL Routers and my friend I must tell you that the configuration thought by you couldn't be achieved by the 800 Series at all.
I would request you to consider the Cisco's latest series of 1800 or somewhat older series of 1700 Routers.
Regards,
Wilson Samuel
08-15-2006 09:42 AM
Hi,
Thanks for your post again. But i have some new questions... Why did you told me that the configuration thought by me is not possible? I want to have a connection with ADSL and two separate LANs, and to forward some ports to one of the LANs. The thing i want ot do is something like this, this is also part of owr current config of the cisco 1720 :
interface ATM0
no ip address
load-interval 30
no atm ilmi-keepalive
dsl operating-mode ansi-dmt
no fair-queue
hold-queue 224 in
!
interface ATM0.1 point-to-point
pvc 2/32
encapsulation aal5mux ppp dialer
pppoe-client dial-pool-number 1
!
!
interface Ethernet0
ip address 192.168.1.1 255.255.255.0
ip nat inside
full-duplex
!
interface FastEthernet0
ip address 100.200.x.x.255.255.0
ip nat inside
speed auto
!
interface Dialer1
ip address negotiated
ip mtu 1492
ip nat outside
encapsulation ppp
dialer pool 1
ppp authentication chap callin
ppp chap hostname LOGIN
ppp chap password PASS
!
ip nat inside source list 1 interface Dialer1 overload
ip nat inside source static tcp 192.168.1.3 8080 SOMEIP 8080 extendable
ip nat inside source static tcp 192.168.1.2 80 SOMEIP 80 extendable
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer1
no ip http server
ip pim bidir-enable
!
!
access-list 1 permit 100.200.20.0 0.0.0.255
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 2 permit 100.200.20.0 0.0.0.255
no cdp run
OK, the 1720 has a wan card for the adsl, one integrated 10/100 port and one wic 10M card. So it has 2 interfaces. The problem is thata the 1720 is obsolate and we can not connect with the second LAN to 100M...
With the 877 I saw that we can configure the cisco with vlan, so i can connect one of the netwoks to one of the ports to the switch and the aother to another. So i can do it with VLAN, Even i saw but i'm not sure that we can configure the 4 interfaces ports of the swicth separately, like:
interface FastEthernet0
ip address ...
interface FastEthernet1
ip address ...
interface FastEthernet2
ip address ...
interface FastEthernet3
ip address ...
and not using vlans... You've consided me the series of 1800, but they offers me more VPNS, more switch ports, better performance, etc. But only the 1841 is not fixed configuration, support extention cards, has two wan ports... So i did not understand why you considered me the 1800 series, what it will helps me? So pleace explain me much more about what you think.
Regards,
Momchil
08-15-2006 12:42 PM
I have an 837 and you can do exactly what you are talking about. You will have 3 routed interfaces, 2 physical and one virtual. Interface E1 is tied to ports f1,f2 and f3 on the 4-port switch and port f4 is tied to interface E2.
08-15-2006 11:51 PM
Thanks Again, So I can do it on the 877 too. Can you give me a portion of your configuration file, this can be useful for me.
Regards, Momchil
08-16-2006 04:34 AM
interface Null0
no ip unreachables
!
interface Ethernet0
description inside-interface
ip address ************* 255.255.255.0
ip access-group 100 in
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat inside
ip virtual-reassembly
ip route-cache flow
hold-queue 100 out
!
interface Ethernet2
description dmz1-interface
Ip address **************** 255.255.255.248
no ip redirects
no ip unreachables
no ip proxy-arp
ip virtual-reassembly
ip route-cache flow
hold-queue 100 out
!
interface ATM0
description dsl interface async
no ip address
ip mtu 1492
ip virtual-reassembly
no atm ilmi-keepalive
dsl operating-mode auto
bridge-group 1
bridge-group 1 spanning-disabled
no routing dynamic
pvc 0/35
!
!
interface FastEthernet1
speed 100
full-duplex
!
interface FastEthernet2
shutdown
speed 100
full-duplex
!
interface FastEthernet3
shutdown
speed 100
full-duplex
!
interface FastEthernet4
shutdown
speed 100
full-duplex
!
interface BVI1
description outside-interface
ip address dhcp
ip access-group 2010 in
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip inspect FW-RULE-1 out
ip ips INTRUSION-RULE-IPS_ips_rule in
ip virtual-reassembly
ip route-cache flow
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