| Author |
Message |
Guest
|
 Posted:
Tue Nov 15, 2005 1:32 am Post subject:
Many 802.1q tagged vlans, 1 Cisco 2621 router |
|
|
I am having a difficult time understanding what I need. Here is the
network (yes I have installed a nm-1e into the 2621 to get 3 lan
interfaces)
tagged vlans ---- fa0/0 #Cisco router# fa0/1 ---- tagged vlans
|
eth1/0 (internet)
Cisco eth 1/0 has 10.1.0.2/24 (default gateway is 10.1.0.1)
cisco fasteth0/0 has 10.2.0.1/24, physically there are about 45 tagged
VLANs coming over this interface, hosts using the 10.2.0.0 subnet
cisco fasteth0/1 has 10.5.0.1/24, physically there are about 45 tagged
VLANs coming over this interface, hosts using the 10.5.0.0 subnet
Basically I need to be able to get all 90 tagged vlans to be able to
talk on to internet
I think I need to use bridge-group for this, will this config do what i
need or do I need to add eth1/0 to the bridge-group 1 as well? Or
something completely different?
int fa0/0
bridge-group 1
interface fa0/1
bridge-group 1
exit
bridge 1 protocol ieee |
|
| Back to top |
|
 |
Guest
|
| Posted:
Tue Nov 15, 2005 4:10 am Post subject:
Re: Many 802.1q tagged vlans, 1 Cisco 2621 router |
|
|
Let me clarify a couple of points too. The switches are NOT cisco (no
ISL) but do support 802.1q tagging. I basically want the FE ports on
the router to allow any traffic no matter want tagged VLAN they are
coming from and all hosts and VLANs talking to FE0/0 are coming from
the same IP subnet, and likewise all hosts and VLANs talking to FE0/1
are coming from their own subnet.
Is this possible? I have IOS Version 12.2(31) w/feature set IP/Plus. I
don't need to have one VLAN to be able to talk to another VLAN, at
least not right now, I am more in need of getting the VLANs to be able
to talk to the internet. Ideally I would like to use different more
capable switches, but that is not a possibility right now. |
|
| Back to top |
|
|
MC
Guest
|
| Posted:
Wed Nov 16, 2005 7:44 am Post subject:
Re: Many 802.1q tagged vlans, 1 Cisco 2621 router |
|
|
justin.krejci@gmail.com wrote:
| Quote: | Let me clarify a couple of points too. The switches are NOT cisco (no
ISL) but do support 802.1q tagging. I basically want the FE ports on
the router to allow any traffic no matter want tagged VLAN they are
coming from and all hosts and VLANs talking to FE0/0 are coming from
the same IP subnet, and likewise all hosts and VLANs talking to FE0/1
are coming from their own subnet.
Is this possible? I have IOS Version 12.2(31) w/feature set IP/Plus. I
don't need to have one VLAN to be able to talk to another VLAN, at
least not right now, I am more in need of getting the VLANs to be able
to talk to the internet. Ideally I would like to use different more
capable switches, but that is not a possibility right now.
will need to configure subinterfaces, one for each VLAN you need. |
On each sub interface will set encapuslation to dot1q
for example:
interface ethernet 0/0.100
encapuslation dot1q 100
Just repeat the aboce for each VLAN needed, the subinterface number can
be any number but I chose the same as the VLAN ID. the number at the end
of the encapsulation command must be the VLAN ID.
Make sure that 801.q1 tagging is set on the port of the switch that the
router is connected, setup switch VLANs.
MC |
|
| Back to top |
|
|
Guest
|
| Posted:
Tue Dec 06, 2005 3:46 am Post subject:
Re: Many 802.1q tagged vlans, 1 Cisco 2621 router |
|
|
Thank you for the reply. I had already tried that but it did not work.
Hosts on the VLAN were not able to talk to the IP address on the
physical interface. The work around I have done is add 1,000 lines of
config to the router (good thing from scripting languages like perl) to
setup all of the sub interfaces (1 for each VLAN) and the DHCP server
pools (1 for each VLAN). So I am just using a class C address block for
each VLAN but since they are all NAT'ed I can use up as many as I want.
So I have a whole of lines that are similar to this
ip dhcp pool vlan149
network 10.5.149.0 255.255.255.0
default-router 10.5.149.1
dns-server X.X.X.X Y.Y.Y.Y
interface FastEthernet0/1.149
encapsulation dot1Q 149
ip address 10.5.149.1 255.255.255.0
no cdp enable
With the large config and only 32K of NVRAM I also had to enable config
compression so it would all fit in NVRAM. This is done via this config
line
service compress-config |
|
| Back to top |
|
|
|
|
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in