For success on your CCNA 640-802 and CCENT exams, you call for to grasp how and why Frame Relay LMI messages operate. You obligation to know this for real-world networking as well, since Frame Relay is prevailing in today's networks - and lacking LMI, you have no Frame Relay!

The Local Management Interface (LMI) messages are dispatched involving the DCE, as usual the resource provider, and the DTE, the Cisco skilled worker. LMI Status messages ladle as keepalives for the framework link. If keepalives are not continually prescriptive by some the DCE and DTE, the supporting structure connexion will small indefinite amount. The LMI as well indicates the PVC cachet to the router, reflected as either influential or unreactive.

The LMI types must match on the DTE and DCE for the PVC to be recognized. There are 3 types of LMI:

Post ads:
Annalee + Hope Women's Jamie Top / G by GUESS Hardcase Wallet / Lucky Brand Women's Plus-Size Painterly Rose Kara Top / BCBGeneration Women's Criss Cross Back Dress / Nippies Skin - Reusable Natural Looking Ultra Thin Matte / Black Gorgeous Rhinestone Studded Belt / Levi's Women's 529 Styled Curvy Mid Rise Boot Cut Jean / Levi's Women's Legging Super Skinny Jean / Parker Women's Wrap Dress / 2B Bebe Logo Basic Rhinestone Tee / Velvet Women's Abana Cashmere Blend Open Cardigan / Pendleton Women's Petite Snoqualmie Sweater Coat / S5 Selected Smooth Small Eyeglass Case / Patagonia Down Sweater - Women's / bebe Cap Sleeve Wave Textured Dress -Web Exclusive / Fuzzy Socks Solid Colors - 12 Pairs, Size: 9-11 / Roxy Secret Stash / AGB Women's Print Yoryu Top / GUESS Bella One-Shoulder Top

Cisco (the defaulting)

ansi

q933a

Post ads:
Lilly Pulitzer Women's Helena Sweater Dress / Bolle Anaconda Sunglasses / Roxy Juniors Inspire Fleece Pullover / Lucky Brand Jeans Co Lace Scoop Neck 3/4 Sleeve Navy Blue / Jones New York Women's Assorted Stripe Knit Bateau Neck / Woman Within Plus Size Turtleneck sweater with rich ribbed / Hue Womens Textured Diamond Tight / Tiana B Women's Perfect Little Dress / Armani Exchange Striped Sweater Hoodie / Footless Shaper / Gentle Fawn Twig Top / Monrow Women's Vintage Heather Fleece Sweat Pant / 7 For All Mankind Women's The Highwaist Skinny Jean / Womens Pulse Snowboarding/ski Coat Jacket Parka, 3in1, / Chaus Women's Short Sleeve Deep Cowl Neck Marled Sweater / Barely There Women's Invisible Look Lift Underwire Bra / Woman Within Plus Size Coat, A-line in wool-blend / North Face Half Dome Hoodie - Women's / Bailey 44 Women's Lets Get Stoned Top

The LMI nature can be varied near the bones lmi-type command. Before doing anything with the skeleton relay commands, though, we have to change framework relay on the interface near the condition frame-relay instruct. Remember, the defaulting condition category on a Cisco Serial interface is HDLC.

R1(config)#interface serial0

R1(config-if)#encapsulation ?

atm-dxi ATM-DXI encapsulation

frame-relay Frame Relay networks

hdlc Serial HDLC synchronous

lapb LAPB (X.25 Level 2)

ppp Point-to-Point protocol

smds Switched Megabit Data Service (SMDS)

x25 X.25

R1(config-if)#encapsulation frame-relay

R1(config-if)#frame-relay lmi-type ?

cisco

ansi

q933a

We can hardcode the LMI style as shown in that example, and there's different way to get the LMI to clash near the cut off DCE. LMI Autosense has the skilled worker transport out an LMI Status communication for all cardinal LMI types.

The skilled worker past waits for a result for one of those LMI types from the DCE. When the trained worker sees the reply to its LMI Autosense messages, the trained worker will past distribute lone the aforesaid LMI nature it standard from the DCE.

On few and far between occasions - specified as your CCNA exam, possibly :) - the Frame LMI may not contest. We'll pocket a face at specified a script in the next installment of my discriminatory Cisco CCENT / CCNA 640-802 certification exam teacher series!

orteg89o 發表在 痞客邦 PIXNET 留言(0) 人氣()