15 May 07 Adventures with the Cisco 871W (Part 2)
In the previous post, I got my new Cisco 871W Integrated Services Router attached via serial cable to my laptop and changed the factory default username and password. Next step, set the router hostname and get the new box talking on my internal network.
First step is to make sure I can recover if something goes wrong. I found instructions on backing up my config through HyperTerminal or TFTP on Cisco’s site.
Next we set the hostname and domain.
yourname# configure terminal
yourname(config)# hostname fw
fw(config)#
Notice the hostname change took effect immediately.
fw(config)# ip domain name domain.com
fw(config)# exit
fw# copy running-config startup-config
Now the new hostname and domain name are saved to the startup configuration. Next up, setting the network information.
fw#show ip interface
FastEthernet0 is up, line protocol is down
Internet protocol processing disabled
FastEthernet1 is up, line protocol is down
Internet protocol processing disabled
FastEthernet2 is up, line protocol is down
Internet protocol processing disabled
FastEthernet3 is down, line protocol is down
Internet protocol processing disabled
FastEthernet4 is administratively down, line protocol is down
Internet protocol processing disabled
Dot11Radio0 is administratively down, line protocol is down
Internet protocol processing disabled
Vlan1 is up, line protocol is down
Internet address is 10.10.10.1/29
Broadcast address is 255.255.255.255
-- Cut --
Virtual-Dot11Radio0 is administratively down, line protocol is down
Internet protocol processing disabled
fw#
fw#show vlans
No Virtual LANs configured.
fw#
Wait a second! “No Virtual LANs configured”? The interfaces show Vlan1 is up?
fw#show vlan-switch
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0, Fa1, Fa2, Fa3
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 1002 1003
1002 fddi 101002 1500 - - - - - 1 1003
1003 tr 101003 1500 1005 0 - - srb 1 1002
1004 fdnet 101004 1500 - - 1 ibm - 0 0
1005 trnet 101005 1500 - - 1 ibm - 0 0
fw#
Aha! Vlan1 is the default Virtual LAN and all ports are assigned to it. Since I do not have the Advanced IP Services Cisco IOS Software Image I cannot add more Virtual LANs. With Advanced IP Services I can have up to four VLANs on the 871W. Looks like I need to configure the default VLAN.
fw#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
fw(config)#interface Vlan1
fw(config-if)#ip address 192.168.138.1 255.255.255.0
fw(config-if)#no ip route-cache
fw(config-if)#exit
fw(config)#exit
fw# copy running-config startup-config
fw#
Now all the internal interfaces on my router are configured to the 192.168.69.0/24 network. Next up, setting up the DHCP server!
Reader's Comments
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It is possible to configure a different ip and to create a new vlan in the vlan database: http://www.len.ro/work/articles/basic-cisco/view
Do you know from the back of your head what kind of traffic this box can push?
I would like something cisco that can do over 20mbit, but is still suitable for home usage - this one may seem like a nice one.
Not off the top of my head, but the reports I got from some folks I know in the podcasting world indicate that this box will keep up with available bandwidth better than anything else in the SOHO space. I have had great luck with it.