687983_a1d9b_aliev_t_i_seti_evm_i_telekommunikacii

123456 4. 768926ABC5 D5EF

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(bridge/router FEF F72 C brouter).

4.2.3. 9 525938

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261

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12 F7 7F «42 59C92B-42 59C92B» 2 59 62 B F3C9A 56E 487 B F.

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263

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264

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4.2.3.3. "3 3E7FC9E 789 7 FF 3AA C5C323!

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1. 3 25#E6 «6F4358 6 3E5A 6$%243 252 6» («Spanning Tree»),

4292B 62D32E 9 C392 C9F 84F 26B E 9A B 323F 75 427"F 5BC F 83 D 3 8 9F E F84E 7F 6 9 EA F F4E23 3 CB$B59C (DC 4759 CB$B5923).

/E 2BF9 «Spanning Tree» B CEFD5 98 3 3 +9C6C (BF8.4.17):

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RFC 1042).

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265

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4. 58358 2C6 8 56 8E6 7 DC3F8F 2 29 9 72E2 FF 8 9F, 7C6BF B 659#:

•6BF6F8 3C7F 6BF2BF9 9C 62B9C 42 59C92BC;

•7CD7C 7F 6BF2BF9 9C 4C BC 3 82293 9893FF 82 89C7 CB92 IEEE 802.1p, 4292B 6B 58 C9BF3C 9 2 F 262E7F9 EA7 DC 2E2324 E 4C B23 Ethernet, 82892 F FD 35 C 9 (6 B 62E C77 4C BC),3 F9C DC C 9 6BF2BF9 9 4C BC.

132 893C 42 59C92B23, 62D32E F E24CEFD23C9A F 4279B2EFB23C9A 62924F C77, C 9C4 56BC3E 9A F F 8 62 2 A 62EAD23C9 EA84F "FEA9B23, 62D32E 9 F862EAD23C9A 42 59C92B E 6289B2 7F 3FB95CEA7 1 (1, VLAN – Virtual LAN).

4.2.4. E 8

&7E – 6B2 BC 72-C66CBC97 42 6E 48, 82 F7 F BCD72B2 7 8 9F FEF 8 9 3 589B2 893C F 62D32E F B$C9A 6B2 E, 83 DC77 8 BCDEF F 6B29242E23 F 8F89 C B 8C FF.

0E D 6 B 32 9 BCDEF 7 8 9 3 6B29242E F 62D32E 9 BCDEF 7 8 9 3 589B2 893C 7 6B2892 82 F7 9A8, C BC 29C9A 4C4 F7C 8 9A. 4C 893 6BF B23 2 72 7CD3C9A 6C4 97 C C69 B (PAD), 4273 B92B 6B29242E23 F 589B2 893C, 82 F7 F 8 9F Ethernet F &.25. 8 9F Internet $E D2 C892 7CD 3C 98 8 9 32 CB$B59FDC92B.

0E D 2 86 F3C 9 2E F79 EE 495CEA7 F 2E E 77 8 B3F8, 289 F CB$B59FDC92B F 2 59 BC 29C9A 7C 3 8$F 5B237 OSI-2 EF.

4.3. 3 A48 C 43 8 34 43

.C4 54CD 3CE28A 3 BCD E 1, 42 59C F 6C4 923 3 42 6A 9 B7 8 9 2 9 9A B CEFD23C7C 35 86282 C F:

•7C 28723 2B 6456 73B 6 B C F 6C4 923 2C 673 F278 32 87278 5 3DCF 2 8935 F F C 27 79C F 8 9F;

•7C 28723 85 6F 7343 E676F6 673 F2782 32 87278.

! B C C 6C4 923 7C 28723 85 6F 7AD E676F3 $FB242

6BF 7 98 6BF 6289B2 7FF E2 CEA7 3 F8EF9 EA7 8 9 8 42 59C F 6C4 923 F 2 86 F3C 9 7CF 2EA$5 +"" 49F37289A E 2E 23B 77 5892 F3 6292423 C77. ! B C C 6C4 923 7C 28723 3FB95CEA7 4C7CE23 B CEFD23C7C 3 8 9 &.25, Frame Relay F /)(.

4.3.1.3C7 C 636 2 C 24659 72 9A79 6 C35 2EF78 4272E9

15 8935 9 3C 9F6C 3FB95CEA7 4C7CE23:

•5 D143D2 431D6789 6967 (Switched Virtual Circuit, SVC), 4292B 82D C#98 62 DC6B285 C 27 79C 2 7C CEC 6 B C F C77 F 92EA42 7C 3B 8 C78C;

•B5A15 99 431D6789 6967 (Permanent Virtual Circuit, PVC), 4292B 82D C 98 3B5 75 C F7F89BC92B2 8 9F (32D 2 72, 8

266

123456 4. 768926ABC5 D5EF

6BF3E 7F 79BCEFD23C77 8B 893 56BC3E 7F 8 9A) F 7 FD 7 98 3 9 7F 289C92 72 EF9 EA72 2 (3 6B E 7 2 BC7F 772 2) 3B 7F.

!BF 82D C7FF ((% #%5( $# %26 2 262

CB$B59FDC F 6C4 923 3 5DEC 8 9F 3 62E7 98 8 F862EAD23C7F CB$B597 9C EF 3F E3 3 87 56C 7C +9C6 589C723E 7F 82 F7 7F. !BF +92 4C 2 5 3FB95CEA72 5 4C7CE5 6BF83CF3C 98 4C2914 4 6153

(95 23) 431D67895F5 69676 (Virtual Channel Identifier, VCI), 7C 28723 4292B2 2 3 CEA7$ 6B2F8 2 F9 6 B C C 6C4 923 5 5DEC F 8 9F. -7C 7F VCI F 9 7 E2 CEA7 CBC49 B, C E24CEA7 – 8935 9 92EA42 3 6B EC C772 2 5DEC, 6BF # VCI 3 BCD7 5DEC 2 72 2 F 92 23FB95CEA72 2 4C7CEC 3 2 8E5 C BCDEF 7. 6B2 88 82D C7F 3FB95CEA72 2 4C7CEC E 4C 2 2 62B9C 5DEC "2B FB5 98 6 F8 A E3 6 88, 6B 6F8 3C F, 7C 4C42 62B9 75 72 6 B C9A 6BF$ $F 6C4 9 8 26B E 77 D7C 7F VCI. !28E 82D C7F 3FB95CEA72 2 4C7CEC 5DE 6B2 3F C 9 6C4 9 7C 28723C7FF D7C 7F VCI 7 2EA$2 BCDB 7289F (7 2E 24 F9), C 7 C B 823 EF72 8 94F F C 8297F F9. .B2 92 2 9C EF 42 59C FF 62B923 2 72 82 B C9 7A$ DC6F8, 9C EF CB$B59FDC FF, 9C4 4C4 BC7 9 83 7F 92EA42 2 8935 F 3 C77 2 79 82 F7 7F, 6B2 2 F B D C77 62B9 42 59C92BC.

)C4C 2B C7FDC F 6 B C F C77 62D32E 9 5 7A$F9A DC B 45 6C4 923 3 8 9F DC 8 9 8E 5 F "C492B23:

1)52 2782 3 53 8#2788 6E2 6 5878 62 A 522 FD-DC 7A$2 BCD BC 9C EF 42 59C FF;

2)3C56 62 ( 2E 8 76 (3F2C76) E353 252 698 677AD

DC 8 9 5 7A$7F 2EF 8E5 72 F7"2B C FF 3 DC 2E234 6C4 9C, 9C4 4C4 F 79F"F4C92B 3FB95CEA72 2 4C7CEC 3 DC 2E234 6C4 9C 2 72 DC7F C 9 7 2E 24 F9, 3 92 3B 4C4 C B 8C 427 7 5DE23 3 9 BBF92BFCEA72-BC86B E 77 F E2 CEA7 8 9 2 72 F 9 289C92 72 2EA$5 EF75 F DC7F C 9 6 F 2E C 9.

2862EAD23C7F & ! $# %26 ! 2 26$ (PVC) 2E +"" 49F372, 42 59FB5, 62842EA45 298598935 9 +9C6 589C723E 7F 82 F7 7F, F 6B2 3F 7F 4C B23 3 62E7 98 7C 28723 DCBC7 8"2B FB23C77 9C EF 42 59C FF. 3 3 77AB 85 6F 7AB E676F 62 2 7 A 2F2773 E676F – 2 7 6C4 9C F 2 9 6B2F8 2 F9A 3 E 2 2 79 3B 7F. 92 3B PVC 29EF C 98 29 3 E 772 2 4C7CEC 9, 92 62EAD23C9 EA EF9 6B2658475 86282 7289A 8 9F 8 B5 F F 62EAD23C9 E F. 1 2 72 892B27, +92 2 58E23EF3C 9 2872372 7 289C924 PVC 62 8BC37 7F 8 3 E 77 4C7CE2 – 29859893F CBC79F 29728F9 EA72 B CEA72 6B 289C3E 2 6B2658472 86282 7289F, C 8 B5 2 892B27 – EC 9 F862EAD23C7F PVC $3E, CB 7 C 3 E 772 EF7FF.

6 F 6B2 3F 7F 6C4 923 7C 28723 9C EF 42 59C FF 7CD 3C 98 5 D16 42, C 5DE 8 9F – 5 D161536 4, 4292B

267

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2 72 BC 29C 9 7 7C 9B 9A (8 9 32), C 7C 392B2 (4C7CEA72) 5B237 OSI-2 EF.

!BF7 F6 6 B C F 6C4 923 7C 28723 3FB95CEA7 4C7CE23 BC88 29BF 7C 6BF B "BC 79C 8 9F, 6B 89C3E 772 2 7C BF8.4.18. 3DE (42 6A 9 B 62EAD23C9 E) A, B, C, D, E, F 83 DC7 3 8 9A 8 62 2 A 3- 9 B# 62B923 42 59C92B23 .1, .2 F .3.

		VCI=56	1
VCI=41
/	1	3
VCI=44		(1
		VCI=36
	2	4
VCI=23
		VCI=72	1

2	1
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3	D

4

2

3	E
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4	F

4.18

%E 589C723E 7F 82 F7 7F 5 427 7 F 5DEC F 5D E- F892 7F4 628 EC 9 86 FCEA7 6C4 9 – DC6B28 7C 589C723E 7F 82 F7 7F (Call Request), 4292B 82 B F9 C B 8 5DEC 7CD7C 7F F 72 B 3FB95CEA72 2 82 F7 7F VCI. '929 72 B F 9 E24CEA72 D7C 7F E 4C 2 2 62B9C (5DEC F 42 59C92BC) F 3 FBC 98 FD 72 893C 832 2 7 3 C77 2 79 72 B23. 8 B D 2 F7 62B9 2 72 589C723F9A 289C92 72 2EA$2 42EF 8932 3FB95CEA7 82 F7 7F.

!589A 427 7 5D E /, 589C7C3EF3C F 3FB95CEA72 82 F7 7F 8 5DE2 B, 8"2B FB23CE 6C4 9 Call Request 7C 589C723E 7F 82 F7 7F, 3 4292B2 54CDC7 C B 8 7CD7C 7F /4= F 72 B 3FB95CEA72 2 82 F7 7F VCI=41. !C4 9 Call Request 7C6BC3E 98 3 62B9 1 42 59C92BC

.1 8 9F, 62 C B 85 7CD7C 7F 8 F862EAD23C7F 9C EF CB$B59FDC FF (BF8.4.19,C) 26B E 98 72 BC 62B9C .1, 7C 4292B 75 72 6 B 8EC9A 6C4 9.

82293 9893FF 8 9C EF CB$B59FDC FF 6C4 9 Call Request 8 62B9C 1 7C6BC3E 98 3 62B9 3. * 723B 772 42 59C92B DC 7 9 3 6C4 9 72 B 3FB95CEA72 2 82 F7 7F VCI=41 7C 7232 D7C 7F, 4292B2 3 FBC 98 FD 72 893C 832 2 7 72 B23 E 3 2 72 2 62B9C 3. 7C$ 6BF B +92 D7C 7F VCI=56. 4CEF F BCD7 72 B23 VCI E BCD7 62B923 42 59C92BC (7C 3 2 F 3 2) 62D32E 9 B CEFD23C9A 56E 487 B F 6 B C F C77.

.B2 9C EF CB$B59FDC FF E 4C 2 2 62B9C "2B FB5 98 9C EF C 42 59C FF. 9C EF 42 59C FF 3 2 72 2 62B9C 1 42 59C92B 29 C 9, 92 3 CEA7$ 6C4 9, 6BF 3$F 7C +929 62B9 8 72 B2 VCI=41 2E 7 6 B C3C9A8 7C 62B9 3, 6BF 72 B 3FB95CEA72 2

268

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4C7CEC 2E 7 9A FD 7 7 7C 56 (BF8.4.19, ). * 723B 772 EC 98 DC6F8A 3 9C EF 42 59C FF 62B9C 3: 6C4 9, 628956F3$F 8 VCI=56 75 72 6 B C3C9A 7C 62B9 1, 7 72 B 3FB95CEA72 2 4C7CEC 7C VCI=41. )C4F 2 BCD2, 6BF 62E5 7FF 6C4 923 3 2 BC972 7C6BC3E 7FF 5D E- F892 7F4 / 62E5 C 9 6C4 9 8 9 72 B2 VCI, 8 4292B 27 296BC3E E F 4 5DE5 .

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2 6 2
								2 6 ((% 2 & #$
(2#+#% 32								35 1								35 2
	BD		-#				.!.	.!.							.!.	.!.
							VCI	!2B9	VCI						VCI	!2B9		VCI
	/		1
							41	3	56						23	4		72
	B		2
							44	4	36
	C		3
	D		3					35 3								35 4
	E		4
							.!.	.!.							.!.	.!.
	F		4
							VCI	!2B9	VCI						VCI	!2B9		VCI
							56	1	41						36	1		44
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