Here some frame formats:
1. IEEE 802.3 Format on originating side:
-------------------------------------------------------------
| | | | |
|
| Destination | Source | Length | 802.2 LLC | Data |
| | | | |
|
-------------------------------------------------------------
appears on the 802.10 VLAN backbone as:
--------------------------------------------------------------
| | | Length | | |Station|Frag| Original |
|
|Dest |Source| |0A 0A 03|SAID| | |
|Data|
| | | + 16 | | | ID
|Flag|802.2 LLC| |
--------------------------------------------------------------
The SAID is the 802.10 defined Security Association ID (4-bytes).
To show it is in the VLAN tag
Go to here:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat5000/rel_6_2/_config/
vlans.htm#36315
SAID value= 100,000 plus the VLAN number (for example, the SAID for VLAN 3
is 100003)
Sample CLI output
VLAN Name Status IfIndex Mod/Ports, Vlans
---- -------------------------------- --------- -------
------------------------
500 Engineering active 344
VLAN Type SAID MTU Parent RingNo BrdgNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ ------ ---- -------- ------ ------
500 enet 100500 1500 - - - - - 0 0
VLAN AREHops STEHops Backup CRF
---- ------- ------- ----------
Console> (enable)
Another config example
http://www.cisco.com/warp/public/473/32.html#router
Where the trunk between a router and a switch needs to helped to succeed
with a SAID value.
Router
interface Fddi0/0
no ip address
no keepalive
!
interface Fddi0/0.1
encapsulation sde 100820
ip address 100.0.0.2 255.0.0.0
Martijn
-----Oorspronkelijk bericht-----
Van: Nakul Malik [mailto:[EMAIL PROTECTED]
Verzonden: dinsdag 29 juli 2003 14:59
Aan: [EMAIL PROTECTED]
Onderwerp: SAID [7:73165]
Hi,
I was studying for the switching exam and came across the concept of SAID.
The only information i could find was the definition on the cisco site:
Security Association Identifier (SAID) is a user-configurable four-byte VLAN
identifier. The SAID identifies traffic as belonging to a particular VLAN.
It also determines to which VLAN each packet is switched.
_________________
I was looking for a more detailed explanation.
Can anyone tell me more about this?
-Nakul
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=73177&t=73177
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
