Typically Dot1Q tunnelling is used in Metro-E Core based setups where the chances of vlan overlaps between customers and SP's is high.
In a MPLS based Core, this might be done when the customer has a requirement to transport multiple vlans, and the SP would like to preserve his vlan space or use a single VC to transport it to the other end.
In both above cases function of the feature is the same, but the necessity is different or extended.
so for the customer vlan 5 to traverse the WAN and still preserve it original 802.1Q vlan tag, the SP will encapsulate the client vlan 5 with additional 802.1Q-in-Q header and forward it across the WAN to ClientSW2 and will then remove the 802.1Q-in-Q header leaving the original 802.1Q header for vlan 5.
With XR 4.2.0 the ASR9000 is releasing a new line of hardware models. This amongst others is the RSP440, the next generation RSP with faster switch fabric along with Typhoon based Linecards, the next generation network processor.
The Cisco EPN system incorporates a network architecture designed to consolidate multiples services on a single Multiprotocol Label Switching (MPLS) transport network. This network is designed primarily based on...
Internet security is important with the increasing attacks that are happening every day. Many internet and browsing security solutions exist, but some are not very easy to use or maybe the question is how can I enable them?