Introduction to Classless Routing - Revision history

64.86.141.133: /* Calculating subnets with VSLM. */

2006-10-26T18:04:26Z

Calculating subnets with VSLM.

←Older revision		Revision as of 18:04, 26 October 2006
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	</blockquote>		</blockquote>

		+
		+	Summarization is the number of common bits that the route
		+	will adverstized for the different subnets.
		+
		+
		+
		+	=External Link=
	[http://xtronics.com/reference/ip-subnetmasks.htm IP Mask]		[http://xtronics.com/reference/ip-subnetmasks.htm IP Mask]

70.82.223.90 at 03:37, 16 September 2006

2006-09-16T03:37:13Z

←Older revision		Revision as of 03:37, 16 September 2006
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	In order to used VSLM an administrator must configured a router with a routing protocol that supports it.		In order to used VSLM an administrator must configured a router with a routing protocol that supports it.
	Cisco routers support VLSM with:		Cisco routers support VLSM with:
-	*[[Single-Area_OSPF OSPF]]	+	*[[Single-Area_OSPF\|OSPF]]
	*Integrate IS-IS		*Integrate IS-IS
	*EIGRP		*EIGRP

70.82.223.90 at 03:36, 16 September 2006

2006-09-16T03:36:59Z

←Older revision		Revision as of 03:36, 16 September 2006
Line 7:		Line 7:
	In order to used VSLM an administrator must configured a router with a routing protocol that supports it.		In order to used VSLM an administrator must configured a router with a routing protocol that supports it.
	Cisco routers support VLSM with:		Cisco routers support VLSM with:
-	*[[Single-Area_OSPF]]	+	*[[Single-Area_OSPF OSPF]]
	*Integrate IS-IS		*Integrate IS-IS
	*EIGRP		*EIGRP

70.82.223.90 at 03:36, 16 September 2006

2006-09-16T03:36:34Z

←Older revision		Revision as of 03:36, 16 September 2006
Line 7:		Line 7:
	In order to used VSLM an administrator must configured a router with a routing protocol that supports it.		In order to used VSLM an administrator must configured a router with a routing protocol that supports it.
	Cisco routers support VLSM with:		Cisco routers support VLSM with:
-	*[[Single-Area_OSPF ~~OSPF~~]]	+	*[[Single-Area_OSPF]]
	*Integrate IS-IS		*Integrate IS-IS
	*EIGRP		*EIGRP

70.82.223.90 at 03:35, 16 September 2006

2006-09-16T03:35:48Z

←Older revision		Revision as of 03:35, 16 September 2006
Line 7:		Line 7:
	In order to used VSLM an administrator must configured a router with a routing protocol that supports it.		In order to used VSLM an administrator must configured a router with a routing protocol that supports it.
	Cisco routers support VLSM with:		Cisco routers support VLSM with:
-	*OSPF	+	*[[Single-Area_OSPF OSPF]]
	*Integrate IS-IS		*Integrate IS-IS
	*EIGRP		*EIGRP

70.82.223.90 at 03:33, 16 September 2006

2006-09-16T03:33:36Z

←Older revision		Revision as of 03:33, 16 September 2006
Line 1:		Line 1:

-	Network administrators must anticipate and manage the physical growth of networks. This may require them to buy or lease another floor of a building for new network equipment such as racks, patch panels, switches, and routers. Network designers must choose address schemes that allow for growth.	+	Network administrators must anticipate and manage the physical growth of networks. This may require them to buy or lease another floor of a building for new network equipment such as racks, patch panels, switches, and routers. Network designers must choose address schemes that allow for growth. [http://en.wikipedia.org/wiki/IPv4 IPv4 ] offered an address strategy that was scalable for a time before it resulted in an inefficient allocation of addresses. IPv4 may soon be replaced with IP version 6 [http://en.wikipedia.org/wiki/IPv6 IPv6 ] as the dominant protocol of the Internet. IPv6 has virtually unlimited address space and implementation has begun in some networks.
-		+
-	[http://en.wikipedia.org/wiki/IPv4 IPv4 ] offered an address strategy that was scalable for a time before it resulted in an inefficient allocation of addresses. IPv4 may soon be replaced with IP version 6 [http://en.wikipedia.org/wiki/IPv6 IPv6 ] as the dominant protocol of the Internet. IPv6 has virtually unlimited address space and implementation has begun in some networks.	+

	As the enterprise network grows an Network Administrator needs to work with its IP address more efficiently; in this section VLSM and the [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation will be introduced.		As the enterprise network grows an Network Administrator needs to work with its IP address more efficiently; in this section VLSM and the [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation will be introduced.
-		+	Classless Interdomain Routing (CIDR) -The [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation is the expression in bits that identifies the network and host portion of an IP address.
-	;Classless Interdomain Routing (CIDR):The [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation is the expression in bits that identifies the network and host portion of an IP address.	+

	In order to used VSLM an administrator must configured a router with a routing protocol that supports it.		In order to used VSLM an administrator must configured a router with a routing protocol that supports it.

70.82.223.90 at 03:32, 16 September 2006

2006-09-16T03:32:53Z

←Older revision		Revision as of 03:32, 16 September 2006
Line 6:		Line 6:
	As the enterprise network grows an Network Administrator needs to work with its IP address more efficiently; in this section VLSM and the [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation will be introduced.		As the enterprise network grows an Network Administrator needs to work with its IP address more efficiently; in this section VLSM and the [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation will be introduced.

-	;Classless Interdomain Routing (CIDR):The ~~cidr~~ notation is the expression in bits that identifies the network and host portion of an IP address.	+	;Classless Interdomain Routing (CIDR):The [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation is the expression in bits that identifies the network and host portion of an IP address.

	In order to used VSLM an administrator must configured a router with a routing protocol that supports it.		In order to used VSLM an administrator must configured a router with a routing protocol that supports it.

70.82.223.90 at 03:32, 16 September 2006

2006-09-16T03:32:09Z

←Older revision		Revision as of 03:32, 16 September 2006
Line 6:		Line 6:
	As the enterprise network grows an Network Administrator needs to work with its IP address more efficiently; in this section VLSM and the [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation will be introduced.		As the enterprise network grows an Network Administrator needs to work with its IP address more efficiently; in this section VLSM and the [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation will be introduced.

-	;Classless Interdomain Routing (CIDR): ~~the~~ cidr notation is the expression in bits that identifies the network	+	;Classless Interdomain Routing (CIDR):The cidr notation is the expression in bits that identifies the network and host portion of an IP address.
-	and host portion of an IP address.	+

	In order to used VSLM an administrator must configured a router with a routing protocol that supports it.		In order to used VSLM an administrator must configured a router with a routing protocol that supports it.

70.82.223.90 at 03:31, 16 September 2006

2006-09-16T03:31:37Z

←Older revision		Revision as of 03:31, 16 September 2006
Line 2:		Line 2:
	Network administrators must anticipate and manage the physical growth of networks. This may require them to buy or lease another floor of a building for new network equipment such as racks, patch panels, switches, and routers. Network designers must choose address schemes that allow for growth.		Network administrators must anticipate and manage the physical growth of networks. This may require them to buy or lease another floor of a building for new network equipment such as racks, patch panels, switches, and routers. Network designers must choose address schemes that allow for growth.

-	[http://en.wikipedia.org/wiki/IPv4 IPv4 ] offered an address strategy that was scalable for a time before it resulted in an inefficient allocation of addresses. IPv4 may soon be replaced with IP version (6) [http://en.wikipedia.org/wiki/IPv6 IPv6 ] as the dominant protocol of the Internet. IPv6 has virtually unlimited address space and implementation has begun in some networks.	+	[http://en.wikipedia.org/wiki/IPv4 IPv4 ] offered an address strategy that was scalable for a time before it resulted in an inefficient allocation of addresses. IPv4 may soon be replaced with IP version 6 [http://en.wikipedia.org/wiki/IPv6 IPv6 ] as the dominant protocol of the Internet. IPv6 has virtually unlimited address space and implementation has begun in some networks.

-	As the enterprise network grows an Network Administrator ~~need~~ to work with its IP address more efficiently; in this section VLSM will be introduced.	+	As the enterprise network grows an Network Administrator needs to work with its IP address more efficiently; in this section VLSM and the [http://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] notation will be introduced.
		+
		+	;Classless Interdomain Routing (CIDR): the cidr notation is the expression in bits that identifies the network
		+	and host portion of an IP address.

	In order to used VSLM an administrator must configured a router with a routing protocol that supports it.		In order to used VSLM an administrator must configured a router with a routing protocol that supports it.

70.82.223.90: /* Calculating subnets with VSLM. */

2006-09-16T03:24:26Z

Calculating subnets with VSLM.

←Older revision		Revision as of 03:24, 16 September 2006
Line 33:		Line 33:

	==Calculating subnets with VSLM.==		==Calculating subnets with VSLM.==
-	VLSM helps to manage IP addresses. A subnet mask should satisfy the requirements of a LAN with one subnet mask and the requirements of a point-to-point WAN with another. Lets start with an example with a ~~class~~ B 172.16.0.0 and two LAN that requires at least 250 host. If the router uses a clasfull subnet the WAN link must be a subnet of the same class B Network. Without VSLM the WAN link would need the same subnet mask as the LAN segments. A 24 bits mask of 255.255.255.0 can support 250 host.	+	VLSM helps to manage IP addresses. A subnet mask should satisfy the requirements of a LAN with one subnet mask and the requirements of a point-to-point WAN with another. Lets start with an example with a Class B 172.16.0.0 and two LAN that requires at least 250 host. If the router uses a clasfull subnet the WAN link must be a subnet of the same class B Network. Without VSLM the WAN link would need the same subnet mask as the LAN segments. A 24 bits mask of 255.255.255.0 can support 250 host.
	This WAN link only needs two addresses, one for each router, meaning that 252 addresses will be wasted.		This WAN link only needs two addresses, one for each router, meaning that 252 addresses will be wasted.
	In this case we can use VSLM and used a subnet mask of /30 bits , since only two addresses are need it.		In this case we can use VSLM and used a subnet mask of /30 bits , since only two addresses are need it.
-		+	<blockquote>
	[[Image:LAN3.JPG\|Lan needs 250 host each side]]		[[Image:LAN3.JPG\|Lan needs 250 host each side]]
		+	</blockquote>

	[http://xtronics.com/reference/ip-subnetmasks.htm IP Mask]		[http://xtronics.com/reference/ip-subnetmasks.htm IP Mask]