Oct
17
Computing voice bandwidth is usually required for scenarios where you provision LLQ queue based on the number of calls and VoIP codec used. You need to account for codec rate, Layer 3 overhead (IP, RTP and UDP headers) and Layer 2 overhead (Frame-Relay, Ethernet, HDLC etc. headers). Accounting for Layer 2 overhead is important, since the LLQ policer takes this overhead in account when enforcing maximum rate. Read More
Sep
29
As I am sure you have already seen from the blog on setting up the security device as a Layer 2 device, there are many interesting changes that occur on a PIX or ASA when configured for transparent operations. This blog highlights the major changes and guidelines that you should keep in mind when you opt for this special mode of operation. Read More
Aug
14
Can you please help me understand use of Frame-Relay Interface-dlci command. It’s getting mysterious for me day by day as I am studying FR. The reason being is I earlier thought that I should only use this command on FR point to point subinterface. As Point to Point subinterface don’t allow us to put Frame relay map statements. Also in such case Inverse arp should be turned off. But while I was going through Cisco’s FR documentation on website I saw that in almost all examples they used... Read More
Aug
07
For the sake of simplicity and enabling a wider audience we decided to post our regular CCIE brainteasers to the blog.  The winner will get a coupon worth 10% off the price of any of our training packages for R&S, Security, Voice or Service Provider or a $250 Amazon.com gift card! Note that the 10% off discount can not be used with any other discount code you may already have. Please post your solution under the comments for this blog entry - the first person to post the correct solution is the... Read More
Feb
05
Within the scope of Metro Ethernet services, it is often beneficial to provide customers "point-to-point" VLAN service, where VLAN (multipoint service in essence) is effectively set up to emulate ethernet "pseudowire", by disabling MAC-address learning. The benefit comes from saving metro switches CAM tables address space, thus improving overall scalability (which is far from perfect with Ethernet). There is special command, mac address-table learning available on Cisco Metro swtiches (e.g. ME... Read More
Jan
25
The need for fragmentation Read More
Jan
07
Hello Brian,Can you explain how PPP over Frame Relay works? Also what are the advantages and disadvantages of using it over normal Frame Relay configuration?Thanks and regards, Read More

Subscribe to INE Blog Updates

New Blog Posts!