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Cisco 2621 VLAN PXE boot setup
I have a Cisco 2621 router with several VLAN's setup on it. I have ZERO experience with Cisco routers or VLAN's. Currently VLAN2 has an IP helper address that points to our current PXE server. As far as I can tell, this is the only place this is setup on the router.
I am trying to change the PXE server to a different IP address and add a bootfile name as well. What would the commands be on the router to do this? Do I need to delete the IP Helper address and add the PXE server and Bootfile?
The box we are trying to install is a KBOX from KACE for imaging. They have told us these two options are 66 and 67, if that helps at all. Here is the configuration.
I am trying to change the PXE server to a different IP address and add a bootfile name as well. What would the commands be on the router to do this? Do I need to delete the IP Helper address and add the PXE server and Bootfile?
The box we are trying to install is a KBOX from KACE for imaging. They have told us these two options are 66 and 67, if that helps at all. Here is the configuration.
Current configuration : 4089 bytes
!
! Last configuration change at 13:51:15 MST Tue Feb 9 2010
!
version 12.1
no service pad
service timestamps debug datetime localtime show-timezone
service timestamps log datetime localtime show-timezone
service password-encryption
!
hostname DO-C3550-12T-MDF312-07
!
logging buffered warnings
no logging console
no logging monitor
enable secret 5 $1$sAeA$7T8HUcoESlznjeXDgYUz60
!
clock timezone MST -7
ip subnet-zero
ip routing
ip dhcp excluded-address 172.18.5.1 172.18.5.40
ip dhcp excluded-address 172.18.5.4
ip dhcp excluded-address 172.18.5.254
ip dhcp excluded-address 172.18.5.113
!
ip dhcp pool CCUSD-DO
network 172.18.5.0 255.255.255.0
default-router 172.18.5.1
domain-name CCUSD.Local
dns-server 172.18.5.10
lease 0 4
!
no ip domain-lookup
ip name-server 63.225.234.4
!
spanning-tree mode pvst
spanning-tree extend system-id
!
!
!
interface Port-channel1
switchport access vlan 2
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/1
switchport access vlan 2
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/2
switchport access vlan 2
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/3
switchport access vlan 2
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/4
switchport access vlan 2
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/5
switchport access vlan 2
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/6
switchport access vlan 2
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/7
switchport access vlan 2
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/8
switchport access vlan 5
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/9
switchport access vlan 5
switchport mode access
switchport nonegotiate
!
interface GigabitEthernet0/10
switchport access vlan 5
switchport trunk encapsulation dot1q
switchport mode trunk
switchport nonegotiate
duplex full
speed 100
!
interface GigabitEthernet0/11
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet0/12
description "Connection to CCUSD-DO-Router1"
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan1
description "CCUSD-Admin"
ip address 10.41.248.100 255.255.255.0
no ip redirects
no ip mroute-cache
!
interface Vlan2
description "CCUSD-DO-Data"
ip address 172.18.5.1 255.255.255.0
ip helper-address 172.19.5.2
no ip redirects
ip route-cache policy
!
interface Vlan3
description "CCUSD-DO-Voice"
ip address 172.18.10.4 255.255.255.0
no ip redirects
!
interface Vlan41
description "CCUSD-WAN"
ip address 10.41.42.1 255.255.255.0
no ip redirects
!
interface Vlan52
description "CCUSD-DO-Internet"
ip address 192.168.2.2 255.255.255.0
no ip redirects
!
router eigrp 100
redistribute static
network 10.41.42.0 0.0.0.255
network 10.41.248.0 0.0.0.255
network 172.18.5.0 0.0.0.255
network 172.18.10.0 0.0.0.255
network 192.168.2.0
no auto-summary
no eigrp log-neighbor-changes
!
ip local policy route-map DO
ip default-gateway 10.41.248.1
ip classless
ip route 0.0.0.0 0.0.0.0 10.41.42.2
ip route 10.30.20.0 255.255.255.0 10.41.42.3
ip route 172.30.10.0 255.255.255.0 10.41.42.3
ip http server
ip http port 8888
!
!
access-list 110 deny ip 172.18.0.0 0.0.255.255 10.41.248.0 0.0.0.255
access-list 110 deny ip 172.18.0.0 0.0.255.255 10.41.42.0 0.0.0.255
access-list 110 deny ip 172.18.0.0 0.0.255.255 172.18.0.0 0.0.255.255
access-list 110 deny ip 172.18.0.0 0.0.255.255 172.19.0.0 0.0.255.255
access-list 110 deny ip 172.18.0.0 0.0.255.255 172.30.0.0 0.0.255.255
access-list 110 deny ip 172.18.0.0 0.0.255.255 host 10.41.41.1
snmp-server community public RO
!
line con 0
password 7 107F282306181E0803087E3E
logging synchronous
login
line vty 0 4
password 7 073E00764D061506181E5F19
login
line vty 5 15
password 7 073E00764D061506181E5F19
login
!
ntp clock-period 17180181
ntp server 192.5.41.41 prefer
ntp server 192.5.41.40
end
RoutersNetwork Operations
Last Comment
Justin Ellenbecker
Where is your DHCP server? Those options are set on the DHCP server in the scope for the range. Or they can be set as default for the server and are available in all scopes. Is it a windows DHCP server?
ASKER
I was under the impression that this router was acting as the DHCP server. It is the default gateway for all assigned IP's in the network. Is there a way to know for sure?
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rwheeler23
It looks like your router is setup as a DHCP server with the below config. your IP range that is leased out is 172.18.5.1 - 172.18.5.254.
If you are just changing the address of your PXE boot server then all you need to do on the router is change the helper address command so that the router will pass broadcast between that server and the other vlan.
If you are just changing the address of your PXE boot server then all you need to do on the router is change the helper address command so that the router will pass broadcast between that server and the other vlan.
ip dhcp pool CCUSD-DO
network 172.18.5.0 255.255.255.0
default-router 172.18.5.1
domain-name CCUSD.Local
dns-server 172.18.5.10
lease 0 4
ASKER CERTIFIED SOLUTION
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The guide explains how to setup a cisco server to pull auto configs for other cisco devices but the options for the dhcp server should not change. Otherwise as mentioned the IP Helper will forward DHCP and BOOTP requests to the address of the new PXE server.
ASKER
The Helper IP address is pointing to a server that is outside that IP range though. It is pointing to 172.19.5.2 as opposed to the 172.18. Is that going to be a problem? And if not, is all I need to type to set it all up what you posted?
ip dhcp pool CCUSD-DO
bootfile filename
option 66 ascii tftp-server-name (should be an FQDN and DNS should be available to the dhcp server)
Thanks in advance.
ip dhcp pool CCUSD-DO
bootfile filename
option 66 ascii tftp-server-name (should be an FQDN and DNS should be available to the dhcp server)
Thanks in advance.
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"The Helper IP address is pointing to a server that is outside that IP range though. It is pointing to 172.19.5.2 as opposed to the 172.18. Is that going to be a problem? And if not, is all I need to type to set it all up what you posted? "
Yes you want it to point to the other vlan. The ip helper command tells broadcast traffic to be sent to that address on the other vlan.
Yes you want it to point to the other vlan. The ip helper command tells broadcast traffic to be sent to that address on the other vlan.
ASKER
Sorry, but I don't want to mess anything up that is already working. Once I log in and "enable" what exactly should I type to set it up?
ip dhcp pool CCUSD-DO
bootfile filename
option 66 ascii tftp-server-name (should be an FQDN and DNS should be available to the dhcp server)
Is that all, and exactly all I need to do to make it work? Thanks in advance.
ip dhcp pool CCUSD-DO
bootfile filename
option 66 ascii tftp-server-name (should be an FQDN and DNS should be available to the dhcp server)
Is that all, and exactly all I need to do to make it work? Thanks in advance.
replace filename with the boot filename you are using and then replace the tftp-server-name with your server name, this requires DNS or having it setup in the router.
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William Peck
here is how you would remove the old helper address and add a new one.
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