What is checked first, GLBP or static route?

I have 2 routers doing GLBP. The virtual IP address is given to jobs as a default gateway.

When a packet hits the default gateway, it will go to RTR - A. Then the second package request will go to RTR - B. It's all good via GLBP.

The question is, if RTR - A is a static route to 66.66.66.66 and the next hop for this destination is via RTR - B, how will RTR - A treat this package when RTR - is the router that needs to deliver the package to the internet? I mean, how is this Treaty?

GLBP will review the package and then determine what it is RTR - A tour to take it, then it give RTR - A, and then this router will focus on its local routing table and then it give RTR - B because the destination is 66.66.66.66?

Or the static route will take precedence GLBP? but again, only RTR - A will have this static route entry as the network admin pushes everyting for 66.66.66.66 out of the RTR - B. Confusion is the GLBP thing.

Thank you for the help

Hello

GLBP works on a per-host basis and not per package. I mean, when the host is the gateway for the first time, this is the moment where we decide which router is actually going to be pass packets to the host.

Consider this example

Three host X, Y, Z

Two routers with GLBP RTR A and B RTR operating in the Round Robin database

  1. Boots X host receives the IP via DHCP or configured statically, it will send the ARP request to the gateway. ARP request is served by RTR and he sends MAC address. Host X now use RTR A gateway
  2. Boots of host obtains the IP via DHCP or configured statically, it will send the ARP request to the gateway. ARP request this time is served by RTR B because GLBP is set to be in round robin mode. RTR B sends address MAC to host b. host Y will now use RTR B gateway
  3. Boots of the host Z Gets the IP via DHCP or configured statically, it will send the ARP request to the gateway. ARP request is served by RTR has time and he sends MAC address. Host X now use RTR A gateway

RTR has accessibility to 66.66.66.66 network RTR B also accessibility features. This package can be transferred.

X(a) RTR as gateway host sends the packet to 66.66.66.66 going A RTR, which will send to RTR B because of the static route.

Host Y (RTR B as gateway) sends out packets to 66.66.66.66 going to RTR B, which it will process in accordance with its routing table

I hope this helps.

See you soon

Tags: Cisco Security

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