On Friday 17 December 2004 07:53, Georgi Sinapov wrote: --cut-- > > ÐÑÑÑÐÐÑÑ ÐÐ ifconfig ÑÐ ÐÐÐÐÐÐ ÑÑÐÐÐÐÑÑÑÐ ÐÐ > > payload-a, Ð ÐÐ Ð > > ÐÐÐÑÐÐÐÑÐÐÐÐÑÐ > > ÐÐÐÐÑÐ. ÐÑ 68 ÐÐ 12000 ÐÐÐÑÐ ÐÐ payload ÐÐ > > ÑÑÑÐÐÐÐÐ ÐÐ Ð ÐÐÐÐ (ÐÐÐ 12Ð > > ÑÑÐÐÐ > > ÑÑÐÐÑ ÐÐÐÑÐÐÑÐÐÐÐ ÐÐ ÑÑÐÐÐ ÐÐÑÐ ÐÑÐÑÐÐÑ). > > 1500 mtu (ÐÐÐÐÑÑ ÐÐ payload-Ð) > > Ð ÐÑÐÐÐÑÑÑÐÑÐÐÐÐ ÐÐ ÑÑÐÐÐÑÑÐÐÐÑÑ > > (ÐÑÐÐÐÐÐÐÐÐÐ, ÑÐ ÐÐ-ÐÐÑÐÐÐÑÐ ÑÑÐÐÐÐÑÑÐ > > ÑÐ ÐÐÑÐÐ ÐÐÑÐ ÐÐÐÐ ÐÐÐÐ ÐÑ ÐÐÐÐÐÐÑÐÐÐÑ > > ÐÑÐÑ). ÐÑÐÐÐÐÐ ÐÑÐ ÑÐÐÐ 1500 ÐÐÐÐÐ > > 14 ÐÐÐÑÐ ÐÐ ethernet ÑÐÐÑÑÐ, 4 ÐÐÐÑÐ ÐÐ 802.1q VLAN > > ÑÐÐÐÐÐ Ð 4 ÐÐÐÑÐ ÐÐ > > CRC ÐÐÐÑÑÐÐÐÐ ÑÑÐÐ. ÐÐ ÐÑÐÑÐÐ (ÑÐÑÐÐÑÑÐ, > > ÐÐÑÐÐÐÐÑ, ÑÐÐÐÑÐ) ÐÐÐÐÐÐÐÐÑ > > ÐÑÐÑÐÐ ÐÑ ÑÐÐÐ Ð ÐÐÐÐ ÐÐ ÑÐ ÐÐÐÑÑÐÐÐ > > ÐÐÐÐÐ ÐÐÑÑÐÐÐÐÐ. > > ÐÐÐÐÐÐ, ÑÐ ÐÑÐÑÐÐ ÑÐÑÑÐÐÑÐ, ÑÐ ÑÑÐ ÑÐÐÐ dot1q > ÑÐÐÑÐÑÐÐÐÑÐÑÑÐ, ÐÐ ÐÐÑÐ > ÐÑÐÑÐÐ Ñ ÑÐÑÐÑÐÑÐ:) ÐÐÐÑÐÐÐÑÐÐÐÐÑÑ > ÑÐÑÐÐÐÐÐ ÑÑÐÑÐÐ (overhead) ÐÐ tagged
ÐÐÐ ÐÑÐÐÑÐ ÐÐ ÑÑÐ ÑÐÐ IEEE 802.1q ;-) ÐÐÐÐÑÑÐÐÐÐÑÐ ÐÐÐÑÐ ÐÐÐÐÐÐÐÐÑ Ð Ð ÑÐÑÑÐ ÐÐ ÑÐÑÐÑÐ, ÐÑÐÐÑÐ ÐÐÐÐÐÐÐÐ ÑÐ ÐÐÐÐÐÐÐÐ ÑÐÐÐ ÐÐÐÑÑÐÐÑÐ: include/linux/if_ether.h include/linux/if_vlan.h > frames Ð 4 ÐÐÑÐÑÐ, ÐÐ ÐÐ ÑÐ ÐÐÐÐÐÐÐÐ ÐÐÑÑÐÐ ÐÐ > VLAN IDs. ÐÐÐÐÑÐÑÐÐÐÑÐ > ÐÐÐÑÐÐÐÐ ÐÐ ÑÐÐÑÑÐ ÐÐ Ethernet frames ÐÑ ÐÐÐÐÐ 9.3 > ÐÐ IEEE std 802.1q-1998 > Ð ÐÐÐÑÐ ÑÐÐÐÐÐ: ÐÐ ÑÑÐ ÐÐÐÐÑÐÐ, ÑÐ Ð ÑÐÐÐ ÐÐ VLAN ID, Ð VLAN tags, ÐÐÐÑÐ ÐÐÐÑÐ Ð ÐÐ ÐÐÐÐÐÑ 4 ÐÐÑÐÑÐ ÑÐ ÑÐ 4 ÐÐÐÑÐ ÐÐ ÑÐÐÐÐÐÐ ;-) Ð ÐÐÑÐ ÑÐ ÐÐÑÐÑÐÑ ÐÐ-ÐÐÐÐÐÑ ÐÑÐ ÐÑÐÑÐÑ ÑÐÐÐ ÐÐÐÐÐÐ ÑÐ ÐÐ ÐÐÐÐÑÑÐÐÐÑ ÐÐÑÐ ÑÐÑÑ ÐÑ payload-a (Ñ.Ð. ÐÑÐ ÐÐÐÐÐ ÑÑÐÐÐÐÑÑÐÐÑÐ 1500) > 0 1 2 3 > 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > | Protocol Type | UP |F| VLAN ID | > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > | TAG Protocol Identifier (TPID)| TAG Control Info (TCI) | > > 2 octets 2 octets > > 0-15 - 802.1q TAG Protocol Type (0Ñ8100) > 16-18 - user_priority. ÐÐÐÐÐÐÐÐÐÐ ÐÑÐÐÐÐÐÐÐÑÐÐÐÑÐ > ÐÐ ÑÐÑÐÑÐÑÐÑ ÐÐÑÐ CoS > ÐÐÐÐ, ÐÐÐÐÐÐÐÑ ÐÐ Layer 3 ToS. 19 - CFI (Canonical Format > Indicator). > 20-31 - VLAN ID -> 2^12 = 4096 ÐÐÐÑÐÐÐÐÐÐ ÐÑÐÐÐÐÐÐ > ÐÐÑÑÑÐÐÐÐ ÐÑÐÐÐ. ÐÐÐÑ ÐÑÑ ;-) -- pub 4096R/0E4BD0AB 2003-03-18 <keyserver.bu.edu ; pgp.mit.edu> fingerprint 1AE7 7C66 0A26 5BFF DF22 5D55 1C57 0C89 0E4B D0AB ============================================================================ A mail-list of Linux Users Group - Bulgaria (bulgarian linuxers). http://www.linux-bulgaria.org - Hosted by Internet Group Ltd. - Stara Zagora To unsubscribe: http://www.linux-bulgaria.org/public/mail_list.html ============================================================================
