Port Trunk
2010
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 Cisco VWIC2 1MFT T1 VWIC 1 Port Multiflex Trunk $14.95 Time Remaining: 22d 3h 54m Buy It Now for only: $14.95 |
 Cisco VWIC 2MFT T1 2 Port RJ 48 Multiflex Trunk T1 Card $40.00 Time Remaining: 18d 10h 48m Buy It Now for only: $40.00 |
 VWIC 1MFT T1 Genuine Cisco 1 Port RJ 48 Multiflex Trunk T1 Interface Card $35.00 Time Remaining: 7d 4h 46m Buy It Now for only: $35.00 |
 Cisco NM HDV with VWIC 1MFT E1 1 Port RJ 48 Multiflex Trunk Interface $179.99 Time Remaining: 27d 3h 19m Buy It Now for only: $179.99 |
 VWIC 2MFT T1 DIR Cisco MWR1941 2 Port RJ 48C Multiflex Trunk w 1 Year Warranty $65.00 Time Remaining: 6d 4h 2m Buy It Now for only: $65.00 |
 VWIC2 1MFT T1 E1 Cisco Updated 1 Port RJ 48 Multiflex Trunk Interface Card $195.00 Time Remaining: 6d 7h 31m Buy It Now for only: $195.00 |
 Cisco VWIC 1MFT T1 1 Port RJ 48 Multiflex Trunk T1 Card $35.00 Time Remaining: 18d 10h 41m Buy It Now for only: $35.00 |
 VWIC 2MFT T1 Cisco 2600 3600 2 Port RJ 48 Multiflex Trunk T1 Free Ground Ship $69.00 Time Remaining: 16d 5h 7m Buy It Now for only: $69.00 |
 Cisco VWIC 1MFT G703 1 Port RJ 48 Multiflex Trunk Voice Interface Card $53.45 Time Remaining: 23d 16h 10m Buy It Now for only: $53.45 |
 Cisco 1Port 2nd Gen Multiflex Trunk $581.95 Time Remaining: 26d 22h 8m Buy It Now for only: $581.95 |
 CISCO VWIC2 1MFT T1 E1 VWIC 1 Port Multiflex Trunk $971.31 Time Remaining: 3d 15h 34m Buy It Now for only: $971.31 |
 Cisco VWIC2 1MFT G703 1PORT 2ND GEN MULTIFLEX TRUNK Kit $1,473.47 Time Remaining: 29d 1h 21m Buy It Now for only: $1,473.47 |
 Cisco VWIC2 1MFT T1 E1 1PORT 2ND GEN MULTIFLEX TRUNK Kit $628.51 Time Remaining: 28d 3h 49m Buy It Now for only: $628.51 |
 CISCO VWIC2 1MFT G703 CISCO 1 PORT MULTIFLEX TRUNK 2ND GEN VOICE WAN G703 $1,296.05 Time Remaining: 15d 3h 55m Buy It Now for only: $1,296.05 |
 CISCO VWIC2 1MFT G703 CISCO 1 PORT MULTIFLEX TRUNK 2ND GEN VOICE WAN G703 $1,296.05 Time Remaining: 15d 4h 9m Buy It Now for only: $1,296.05 |
 CISCO VWIC2 2MFT T1 E1 VWIC 2 Port Multiflex Trunk $1,444.39 Time Remaining: 2d 15h 34m Buy It Now for only: $1,444.39 |
 Cisco Systems Vwic2 1mft t1 e1eql Vwic 1 port Multiflex Trunk vwic21mftt1 e1 $953.32 Time Remaining: 6d 11h 4m Buy It Now for only: $953.32 |
 Cisco VWIC2 2MFT T1 E1 2 Port 2nd Gen Mutliflex Trunk 1 Month Warranty $340.17 Time Remaining: 20d 19h 43m Buy It Now for only: $340.17 |
 Cisco Systems Vwic2 2mft t1 e1eql Vwic 2 port Multiflex Trunk vwic22mftt1 e1 $1,429.98 Time Remaining: 12d 2h 36m Buy It Now for only: $1,429.98 |
 Cisco VWIC2 1MFT T1 E1 1 Port Multiflex Trunk Interface Card 2 x T1 E1 WAN $537.98 Time Remaining: 19d 17h 47m Buy It Now for only: $537.98 |
 Cisco VWIC21MFTT1E1 VWIC 1 Port Multiflex Trunk VWIC2 1MFT T1 E1 $973.98 Time Remaining: 21d 12h 1m Buy It Now for only: $973.98 |
 CISCO 2 PORTS 3RD GEN MULTIFLEX TRUNK VOICE WAN INTERFACE VWIC3 2MFT T1 E1 $1,140.30 Time Remaining: 21d 9h 49m Buy It Now for only: $1,140.30 |
 Alcatel APA8 Board 3EH73031AE 8 ports Analog trunk New $299.00 Time Remaining: 15d 20h 37m Buy It Now for only: $299.00 |
 CISCO 1 PORT G703 MULTIFLEX TRUNK VOICE WAN INTERFACE CARD VWIC3 1MFT G703 $1,026.28 Time Remaining: 14d 10h 55m Buy It Now for only: $1,026.28 |
 Cisco VWIC22MFTT1E1 VWIC 2 Port Multiflex Trunk VWIC2 2MFT T1 E1 $1,473.98 Time Remaining: 21d 12h 1m Buy It Now for only: $1,473.98 |
 CISCO 1 PORT T1 E1 MULTIFLEX TRUNK VOICE WAN VWIC31MFTT1E1 VWIC3 1MFT T1 E1 $744.24 Time Remaining: 14d 10h 55m Buy It Now for only: $744.24 |
 Cisco VWIC34MFTT1E1 4 Port 3rd Gen Multiflex Trunk VWIC3 4MFT T1 E1 $2,944.98 Time Remaining: 11h 49m Buy It Now for only: $2,944.98 |
 CISCO 2 PORTS 3RD GEN MULTIFLEX TRUNK VOICE WAN INT VWIC3 2MFT G703 $1,554.37 Time Remaining: 14d 10h 55m Buy It Now for only: $1,554.37 |
 Cisco VWIC2 2MFT T1 E1 VWIC 2 Port Multiflex Trunk $1,530.99 Time Remaining: 27d 5h 46m Buy It Now for only: $1,530.99 |
 1 Port Multiflex Trunk G703 E1 Voice Wan Interface Card 1 x E1 x WAN Voice WAN $1,688.06 Time Remaining: 22d 23h 8m Buy It Now for only: $1,688.06 |
 CISCO VWIC2 1MFT T1 E1 CISCO 1 PORT MULTIFLEX TRUNK 2ND GEN VOICE WAN T1 E1 $911.33 Time Remaining: 9d 6h 32m Buy It Now for only: $911.33 |
 Cisco VWIC 2 Port Multiflex Trunk $1,480.80 Time Remaining: 14d 5h 1m Buy It Now for only: $1,480.80 |
 Cisco VWIC 1 Port Multiflex Trunk $983.11 Time Remaining: 14d 5h 1m Buy It Now for only: $983.11 |
 Cisco VWIC 2 Port Multiflex Trunk $1,474.22 Time Remaining: 20d 7h 58m Buy It Now for only: $1,474.22 |
 Genuine Cisco used CISCO2821 + VWIC 1MFT T1 1 port RJ 48 multiflex trunk T1 $795.00 Time Remaining: 2d 14h 7m Buy It Now for only: $795.00 |
 Cisco VWIC 1 Port Multiflex Trunk $956.91 Time Remaining: 20d 7h 58m Buy It Now for only: $956.91 |
 NEC NEAX 2000 PN 4COTB Central Office Trunk Card 4 PORT $50.00 Time Remaining: 9d 7h 32m Buy It Now for only: $50.00 |
 Second Generation 1 Port T1 E1 Multiflex Trunk Voice WAN Interface Card 1 x $1,192.60 Time Remaining: 22d 23h 8m Buy It Now for only: $1,192.60 |
 CISCO VWIC2 1MFT T1 E1 CISCO 1 PORT MULTIFLEX TRUNK 2ND GEN VOICE WAN T1 E1 $911.33 Time Remaining: 18d 4h 57m Buy It Now for only: $911.33 |
 Cisco VWIC2 2MFT G703 Cisco 2 Port Multiflex Trunk G703 1 Month Warranty $680.33 Time Remaining: 20d 19h 40m Buy It Now for only: $680.33 |
 Second Generation 2 Port T1 E1 Multiflex Trunk Voice WAN Interface Card 2 x $1,832.58 Time Remaining: 15d 21h 2m Buy It Now for only: $1,832.58 |
 Genuine Cisco used CISCO2821 + VWIC 1MFT G703 1 port RJ 48 multiflex trunk G7 $1,395.00 Time Remaining: 2d 14h 7m Buy It Now for only: $1,395.00 |
 VWIC2 2MFT T1 E1 VWIC 2 Port Multiflex Trunk Cisco $1,483.99 Time Remaining: 9d 11h 11m Buy It Now for only: $1,483.99 |
 VWIC2 1MFT T1 E1 VWIC 1 Port Multiflex Trunk Cisco $984.99 Time Remaining: 9d 11h 31m Buy It Now for only: $984.99 |
Port Trunk
Understanding Trunking And Trunking Protocols
To earn your CCNA or CCNP certification, you've got to understand the basics of trunking. This isn't just a CCNA topic - you must have an advanced understanding of trunking and etherchannels to pass the BCMSN exam and earn your CCNP as well. Before we address those advanced topics, though, you need to master the fundamentals!
A trunk allows inter-VLAN traffic to flow between directly connected switches. By default, a trunk port is a member of all VLANs, so traffic for any and all VLANs can travel across this trunk. That includes broadcast traffic!
The default mode of a switch port does differ between models, so always check your documentation. On Cisco 2950 switches, every single port is in dynamic desirable mode by default, meaning that every port is actively attempting to trunk. On these switches, the only action needed from us is to physically connect them with a crossover cable. In just a few seconds, the port light turns green and the trunk is up and running. The command show interface trunk will verify trunking.
How does the receiving switch know what VLAN the frame belongs to? The frames are tagged by the transmitting switch with a VLAN ID, reflecting the number of the VLAN whose member ports should receive this frame. When the frame arrives at the remote switch, that switch will examine this ID and then forward the frame appropriately.
There are two major trunking protocols you must understand and compare successfully, those being ISL and IEEE 802.1Q. Let's take a look at the details of ISL first.
ISL is a Cisco-proprietary trunking protocol, making it unsuitable for a multivendor environment. That's one drawback, but there are others. ISL will place both a header and trailer onto the frame, encapsulating it. This increases the overhead on the trunk line.
You know that the default VLAN is also known as the "native VLAN", and another drawback to ISL is that ISL does not use the concept of the native VLAN. This means that every single frame transmitted across the trunk will be encapsulated.
The 26-byte header that is added to the frame by ISL contains the VLAN ID; the 4-byte trailer contains a Cyclical Redundancy Check (CRC) value. The CRC is a frame validity scheme that checks the frame's integrity.
In turn, this encapsulation leads to another potential issue. ISL encapsulation adds 30 bytes total to the size of the frame, potentially making them too large for the switch to handle. (The maximum size for an Ethernet frame is 1518 bytes.)
IEEE 802.1q differs substantially from ISL. In contrast to ISL, dot1q does not encapsulate frames. A 4-byte header is added to the frame, resulting in less overhead than ISL. If the frame is destined for hosts residing in the native VLAN, that header isn't added. Since the header is only 4 bytes in size, and isn't even placed on every frame, using dot1q lessens the chance of oversized frames. When the remote port receives an untagged frame, the switch knows that these untagged frames are destined for the native VLAN.
Knowing the details is the difference between passing and failing your CCNA and CCNP exams. Keep studying, get some hands-on practice, and you're on your way to Cisco certification success!
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Sealed or ported box in a trunk?
Im planing on building a ported box in my trunk a lot of people are telling me that it wont work because it is in a trunk an not in a suv. ive heard that only sealed boxes are suppose to be in trunks and ported or bassband boxes are suppose to be in suv because of the more air space.
i have a 1988 Caprice Classic i have 2 12" type R's in a ported box and i havnt had any problems with them but im putting 2 18" subs that are suppose to be in a ported box with 5-8 cu ft per sub
i sure that i have enough space but will this damage my subs with a closed trunk in a ported box
they are idiots. ported boxes are fine in trunks. unless the space in the trunk is not large enough to give the sub room to breath. then just downgrade size. i know those trunks are pretty big, but make sure they're big enough to **comfortably** fit 2 18's. don't do it just because you can
Trunk or Treat 2009 - Port Allen
