I have the following LAN:
Multiples Cisco layer 2 switches with a single Layer 3 - 3750 switch. Multiple vlans in this switched network.
This 3750 connects to a Cisco 2821 router that then connects to a Juniper firewall and another router that points to a separate MetroNet. The DG for the switched network is out the Juniper firewall.
We were having issues with bandwidth so I put a Packetshaper 7500 between the 2821 and the Juniper in bridged mode.
I then wanted to segment traffic on the PS7500 by vlans and then set different policies.
I am having some issues doing this because my understanding of vlans is a bit shaky.
On the 3750, on each port, the following line appears:
switchport trunk encapsulation dot1q
This, I assume, means that I am using 802.1q tagging for vlans and not ISL?
If I log onto the Cisco 2821 and issue the command: sh vlans, the response is: No Virtual LANs configured.
So, how does the router enscapsulate the vlan information? That is, will it pass through vlan information to the Packetshapper 7500.
In terms of routing, the Cisco 2821 uses the dynamic routing protocol, OSPF.
The Juniper firewall is configured to NAT the internal IP info from the inside LAN.