8 votes
Accepted

Single Public IP Address for multiple physical locations

Based on your edit, it sounds like you want anycast. This is a common among large, global companies. You advertise the same network from multiple places, and routing will take traffic to the closest (...
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  • 93.5k
8 votes
Accepted

OSPF increase bandwidth with load-balancing

As these are Point-to-Point links, I would consider using the outage to configure each /30 interface with ip ospf network point-to-point. (New and existing links). This reduces the hello and dead ...
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  • 1,241
8 votes

OSPF increase bandwidth with load-balancing

There's two ways to do that. your proposed way, by adding a second link with its own /30 or /31, making sure that OSPF installs multiple equal cost routes in the routing table, and let CEF's ECMP (...
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5 votes
Accepted

Junos VRF equal-cost, multi-next-hop static routes not balancing

It appears that you're applying the load balancing policy to the routing-instance. It needs to be applied to the forwarding-table in order for it to perform ECMP on the forwarding plane. routing-...
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  • 5,449
5 votes
Accepted

How to set a zero cost link in OSPF

Can one set a link's cost to zero in OSPF? Yes and no... you can't manually set a link's cost to 0, but if you have a Designated Router election on the network, the cost from the DR to any attached ...
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5 votes
Accepted

What's the difference between interdomain and intradomain load balancing?

To answer this question, we have to define the term "domain". Easily spoken, the Internet is a network of networks. In BGP terminology, there are many Autonomous Systems (AS) on the Internet, each of ...
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  • 1,039
5 votes
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Reccomended set up for wifi in dense apartment block?

This level of install requires professionals, or at least experience. 1) 87 apartments means deploying dozens of access points (at least 1 per 3 apartments, possibly 1 per apartment, to be sure you ...
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  • 2,083
4 votes
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Using ECMP for switching in Layer 2

There are two protocols that allow ECMP across L2 networks: Transparent Interconnection of Lots of Links (TRILL) and Shortest-Path Bridging (SPB). TRILL is implemented by exactly two vendors: Cisco (...
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4 votes

load balancing with multiple ISP, one router and asa 5520

If I were you, I would not route the traffic through both the ASA and the RV340. Both devices have similar feature sets (in your scenario), and using both would be redundant. Since you already have ...
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4 votes
Accepted

PP BGP Load Balancing with JUNOS

Per packet load balancing via upstream networks is a bad idea, performance will suffer from out of order packets (which you will have no control over). If you want to balance traffic between your ...
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  • 15.6k
3 votes
Accepted

Load balancing across 2 Multi-link frame relay links- Verizon being difficult

Just an update. Verizon was able to collaborate on load balancing the 3xT1 and the 4xT1 using BGP. All is working as intended so far. Thanks all.
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  • 137
3 votes

What's the difference between interdomain and intradomain load balancing?

Two paths with equal cost is often called equal-cost multipath (ECMP) mechanism. ECMP often works well, but there are a few caveats. Before you get to the issue of running BGP over parallel links, it’...
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  • 41
3 votes
Accepted

Load balancing between multiple layer 3 switches

Actually if your access switches connected to the so called "core switches" have just one uplink, either to the HP or to the Juniper, full redundancy is not an option given your constraints of no ...
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  • 266
3 votes
Accepted

ipsec balancing with multihomed setup

Yes you can do this. As @RickyBeam so loquaciously points out ;-), you can configure routers on both sides to use a routing protocol (OSPF for example) that allows Equal Cost Multi-Path. Each router ...
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  • 62.4k
3 votes

Load balancing among multiple PPPoE servers

PPPoE it's a L2 protocol, you cannot use a L3 redundancy protocol like VRRP. You can put how many PPPoE server as you want on the same broadcast domain and the redundancy will be guaranteed. The ...
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3 votes

How to set a zero cost link in OSPF

The formula for calculating an OSPF cost is (10^8) / Bandwidth ,especially on CISCO routers. So there is no way of dividing by zero you get infinity.However you can manually set a cost on a particular ...
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  • 280
3 votes

BGP loadbalancing: full bgp table vs default route only

Yes it will work in the same way. BGP prefers external to internal routes. Probably. It you are only connected to a single provider, there's no advantage to full routes. Full routes make sense ...
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3 votes
Accepted

What is the preferred way to prevent a particular subnet from being sent to one ASN

MEDs will only affect inbound traffic, so that wouldn't help you here. The fact that your ISPs do not support communities doesn't affect your outbound routing either. For outbound routing, you would ...
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  • 15.6k
3 votes

Creating bandwidth with multiple WAN and LAN ports

You'll need some kind of load balancing. Two WAN links can only be aggregated when they're from the same ISP and they support link aggregation. In all other cases you need to implement load ...
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  • 70.5k
3 votes

load balancing with multiple ISP, one router and asa 5520

I recommend placing the client’s gateway at the ASA. For ASA 9.0 in example, Cisco has published a manual on how to setup a DHCP server with the ASA. As you did not point out the version used, you ...
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  • 153
3 votes

Network routing/WAN failover

The issue is where/what you're tracking. You need to be able to continue to steer traffic over the down route in order to tell when it comes back up. Using PBR for traffic sourced from the router (ip ...
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  • 963
3 votes

F5 backup whole bigIP configuration and save UCS

(tmos)# save /sys ucs Configuration Items: foobar.ucs I guess you are under tmos shell, right? I mean you have to enter in tmos shell running the command "tmsh". Then, you have to write the rest ...
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3 votes

VMware Ethernet connection to two different switches that are linked together - What can result?

ESXi's route based on originating virtual port ID is a good way for a somewhat even load distribution with a larger number of VMs - the virtual port ID is more or less a random value, associating a VM ...
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  • 70.5k
3 votes
Accepted

Native IPv6 load balancing

Just like for IPv4, there are several FHRPs (First Hop Redundancy Protocols) that can do something like that: HSRP, VRRP, GLBP, etc. The problem is that a host will have only one default gateway ...
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  • 93.5k
3 votes

Native IPv6 load balancing

It really comes down to what you're trying to load-balance. IMO, having each host manually configured with different primary and backup gateways to load-share is a bit hokey. Assuming that your ...
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2 votes

Load balancing with multiple ISP, two routers and firewall

Note: Previously Mentioned "Floating Static Route" Yes, as described this will work. However, what if the connection between the routers and the ISP goes down? The ASA would not know about this and ...
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2 votes

Load balancing with multiple ISP, two routers and firewall

You could configure a floating static route. This is a method in which two default routes are configured one with a higher AD than the other so that when one link goes down the route would be removed ...
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  • 21
2 votes

MikroTik: bisschoff load balancing problem?

You can use the routerOS netwatch tool to monitor each ADSL's gateway. When netwatch detects a failure (=no more ping), you can execute a script to disable some rules, and another to re-enable them ...
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