Re: Multiple default gateways, same result?
I believe the biggest reason for routing to a named interface is for ip unnumbered, which would not have a directly connected interface on the same subnet (thus no possibility of a route statement including an ip address would work as it doesn't know how to get there): Router A int e0 ip address 10.1.1.1 255.255.255.0 int s0 ip unnumbered ethernet0 ip route 0.0.0.0 0.0.0.0 s0 Router B int e0 ip address 10.2.1.1 255.255.255.0 int s0 ip unnumbered ethernet0 ip route 10.1.1.0 255.255.255.0 s0 Conside if instead they had the following route statements: Router A ip route 0.0.0.0 0.0.0.0 10.2.1.1 (what routes does the router know? only directly connected 10.1.1.0/24, so it has no way to know how to get to 10.2.1.0/24) Router B ip route 10.1.1.0 255.255.255.0 10.1.1.1 (this one is clearly nonsense) Jason Roysdon, CCNA, MCSE, CNA, Network+, A+ List email: [EMAIL PROTECTED] Homepage: http://jason.artoo.net/ Cisco resources: http://r2cisco.artoo.net/ ""Ejay Hire"" [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Routes to an interface have a Admin distance of 0 (Connected) Routes to an ip have a Admin distance of 1 (Static) ip route 0.0.0.0 0.0.0.0 serial0.1 1 ip route 0.0.0.0 0.0.0.0 10.201.0.74 1 In theory, ip route 0.0.0.0 0.0.0.0 serial0.1 1, should be more efficient because it forwards the packet directly to the next router, whereas, ip route 0.0.0.0 0.0.0.0 serial0.1 1, will put an ARP request on the serial line. The Packet still makes it either way, but the route to an IP is (minimally) faster. ip route 10.48.2.0 255.255.255.0 ethernet0 If I'm understanding correctly, The router already sees this network as connected. This statement would be redundant and unneccessary. (Unless you were redistributing static routes, but that's a different keg o' worms.) Original Message Follows From: [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Multiple default gateways, same result? Date: Tue, 3 Oct 2000 15:28:46 -0500 Hey all, For study purposes I have configured a 'remote' router (Cisco 2501) with the following: E0: 10.48.2.1 255.255.255.0 S0.1: 10.201.0.73 255.255.255.252 point-to-point (FR @ 128K CIR) The 'corporate' router (Cisco 3640) is configured as follows: E0: 10.1.1.2 255.255.0.0 S0/0.1: 10.201.0.74 255.255.255.252 point-to-point (FR) I would like to assign the default gateway for the remote router as follows: ip route 0.0.0.0 0.0.0.0 serial0.1 1 I was wondering how this differs from using: ip route 0.0.0.0 0.0.0.0 10.201.0.74 1 In addition, what advantage/disadvantages might I reap if I also configure the 'remote' with the following line: ip route 10.48.2.0 255.255.255.0 ethernet0 Are there any potential problems with the above line? Thank you, Raul De La Garza III CCNA NNCSS MCSE CNE Senior Network Engineer EmCare Incorporated Work 214.712.2085 Mobile 817.991.7889 FAX 214.712.2444 Pager 877.270.9755 e-mail: [EMAIL PROTECTED] Brave men are all vertebrates: they have their softness on the surface and their toughness in the middle. ?G.K. Chesterton **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Multiple default gateways, same result?
Routes to an interface have a Admin distance of 0 (Connected) Routes to an ip have a Admin distance of 1 (Static) ip route 0.0.0.0 0.0.0.0 serial0.1 1 ip route 0.0.0.0 0.0.0.0 10.201.0.74 1 In theory, ip route 0.0.0.0 0.0.0.0 serial0.1 1, should be more efficient because it forwards the packet directly to the next router, whereas, ip route 0.0.0.0 0.0.0.0 serial0.1 1, will put an ARP request on the serial line. The Packet still makes it either way, but the route to an IP is (minimally) faster. ip route 10.48.2.0 255.255.255.0 ethernet0 If I'm understanding correctly, The router already sees this network as connected. This statement would be redundant and unneccessary. (Unless you were redistributing static routes, but that's a different keg o' worms.) Original Message Follows From: [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Multiple default gateways, same result? Date: Tue, 3 Oct 2000 15:28:46 -0500 Hey all, For study purposes I have configured a 'remote' router (Cisco 2501) with the following: E0: 10.48.2.1 255.255.255.0 S0.1: 10.201.0.73 255.255.255.252 point-to-point (FR @ 128K CIR) The 'corporate' router (Cisco 3640) is configured as follows: E0: 10.1.1.2 255.255.0.0 S0/0.1: 10.201.0.74 255.255.255.252 point-to-point (FR) I would like to assign the default gateway for the remote router as follows: ip route 0.0.0.0 0.0.0.0 serial0.1 1 I was wondering how this differs from using: ip route 0.0.0.0 0.0.0.0 10.201.0.74 1 In addition, what advantage/disadvantages might I reap if I also configure the 'remote' with the following line: ip route 10.48.2.0 255.255.255.0 ethernet0 Are there any potential problems with the above line? Thank you, Raul De La Garza III CCNA NNCSS MCSE CNE Senior Network Engineer EmCare Incorporated Work 214.712.2085 Mobile 817.991.7889 FAX 214.712.2444 Pager 877.270.9755 e-mail: [EMAIL PROTECTED] Brave men are all vertebrates: they have their softness on the surface and their toughness in the middle. ?G.K. Chesterton **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Multiple default gateways, same result?
Hey all, For study purposes I have configured a 'remote' router (Cisco 2501) with the following: E0: 10.48.2.1 255.255.255.0 S0.1: 10.201.0.73 255.255.255.252 point-to-point (FR @ 128K CIR) The 'corporate' router (Cisco 3640) is configured as follows: E0: 10.1.1.2 255.255.0.0 S0/0.1: 10.201.0.74 255.255.255.252 point-to-point (FR) I would like to assign the default gateway for the remote router as follows: ip route 0.0.0.0 0.0.0.0 serial0.1 1 I was wondering how this differs from using: ip route 0.0.0.0 0.0.0.0 10.201.0.74 1 In addition, what advantage/disadvantages might I reap if I also configure the 'remote' with the following line: ip route 10.48.2.0 255.255.255.0 ethernet0 Are there any potential problems with the above line? Thank you, Raul De La Garza III CCNA NNCSS MCSE CNE Senior Network Engineer EmCare Incorporated Work 214.712.2085 Mobile 817.991.7889 FAX 214.712.2444 Pager 877.270.9755 e-mail: [EMAIL PROTECTED] Brave men are all vertebrates: they have their softness on the surface and their toughness in the middle. ?G.K. Chesterton **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Multiple default gateways, same result?
If you specify the next hop IP address, then the static route would have admin distance = 1 (so the "1" at the end of your config is redundant) If you specify the out-going interface, then it would show up as connected in routing table. There is no point to put the "ip route 10.48.2.0 255.255.255.0 ethernet0" because it is also redundant. I would like to assign the default gateway for the remote router as follows: ip route 0.0.0.0 0.0.0.0 serial0.1 1 I was wondering how this differs from using: ip route 0.0.0.0 0.0.0.0 10.201.0.74 1 In addition, what advantage/disadvantages might I reap if I also configure the 'remote' with the following line: ip route 10.48.2.0 255.255.255.0 ethernet0 **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Multiple default gateways, same result?
On Tue, 3 Oct 2000 [EMAIL PROTECTED] wrote: Hey all, For study purposes I have configured a 'remote' router (Cisco 2501) with the following: E0: 10.48.2.1 255.255.255.0 S0.1: 10.201.0.73 255.255.255.252 point-to-point (FR @ 128K CIR) The 'corporate' router (Cisco 3640) is configured as follows: E0: 10.1.1.2 255.255.0.0 S0/0.1: 10.201.0.74 255.255.255.252 point-to-point (FR) I would like to assign the default gateway for the remote router as follows: ip route 0.0.0.0 0.0.0.0 serial0.1 1 I was wondering how this differs from using: ip route 0.0.0.0 0.0.0.0 10.201.0.74 1 Well, for one, when doing interface routing you have a lower administrative distance than a normal static route would carry. They behave much the same way as "connected" interfaces. when you are using "ip unnumbered" it has an advantage that you can change the "corporate" ip and it will be transparent to the remote user. In addition, what advantage/disadvantages might I reap if I also configure the 'remote' with the following line: ip route 10.48.2.0 255.255.255.0 ethernet0 Are there any potential problems with the above line? Thank you, Raul De La Garza III CCNA NNCSS MCSE CNE Senior Network Engineer EmCare Incorporated Work 214.712.2085 Mobile 817.991.7889 FAX 214.712.2444 Pager 877.270.9755 e-mail: [EMAIL PROTECTED] Brave men are all vertebrates: they have their softness on the surface and their toughness in the middle. ?G.K. Chesterton **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] --- Brian Feeny, CCNP, CCDA [EMAIL PROTECTED] Network Administrator ShreveNet Inc. (ASN 11881) **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Multiple default gateways, same result?
Just on a Like Hubert was saying, the route for ethernet is redundant. But just on the side note, if you're pointing to another network of the e0 eg. ip route 123.0.0.0 255.0.0.0 e0, you want to make sure the next hop router on e0 will answer proxy arp. Because that's what the router arps for 123.0.0.0 what it wants to route to it. Clue. On 3 Oct 2000 16:37:28 -0400, [EMAIL PROTECTED] wrote: Hey all, For study purposes I have configured a 'remote' router (Cisco 2501) with the following: E0: 10.48.2.1 255.255.255.0 S0.1: 10.201.0.73 255.255.255.252 point-to-point (FR @ 128K CIR) The 'corporate' router (Cisco 3640) is configured as follows: E0: 10.1.1.2 255.255.0.0 S0/0.1: 10.201.0.74 255.255.255.252 point-to-point (FR) I would like to assign the default gateway for the remote router as follows: ip route 0.0.0.0 0.0.0.0 serial0.1 1 I was wondering how this differs from using: ip route 0.0.0.0 0.0.0.0 10.201.0.74 1 In addition, what advantage/disadvantages might I reap if I also configure the 'remote' with the following line: ip route 10.48.2.0 255.255.255.0 ethernet0 Are there any potential problems with the above line? Thank you, Raul De La Garza III CCNA NNCSS MCSE CNE Senior Network Engineer EmCare Incorporated Work 214.712.2085 Mobile 817.991.7889 FAX 214.712.2444 Pager 877.270.9755 e-mail: [EMAIL PROTECTED] Brave men are all vertebrates: they have their softness on the surface and their toughness in the middle. ?G.K. Chesterton **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
