Can router on different subnet become BGP Neighbour?
Summary of BGP Neighbor Relationships
Do BGP neighbors have to be in the same subnet?
Answer: BGP does not require neighbors to be attached to the same subnet. Instead, BGP routers use a TCP connection between the routers to pass BGP messages, allowing neighboring routers to be on the same or different subnet.
What are the requirements for BGP neighbor relationships?
Answer: There are several requirements for forming BGP neighbors:
– A local router’s autonomous system number must match the neighboring router’s ASN.
– The BGP router ID of the two routers must not be the same.
– Each router must be part of a TCP connection.
– Authentication must be passing if it’s configured.
Do BGP neighbors need to be directly connected?
Answer: Neighbors do not have to be directly connected to each other. IBGP peers are not required to be directly connected, and IBGP uses the IGP path to reach an IBGP peer for its peering connection.
Do OSPF neighbors have to be in the same subnet?
Answer: The subnet mask must match in OSPF except for point-to-point interface types and virtual links.
Can my gateway be on a different subnet?
Answer: Actually, two interfaces do not need to be on the same subnet in order to talk to each other. The IP addresses can be completely different. Both routers will be able to ping each other.
Does each subnet need its own router?
Answer: A subnet is just a range of IP addresses. All the devices in the same subnet can communicate directly with one another without going through any routers. In IPv4, a network interface is connected to only one subnet and has only one IP address.
Can I run two BGP processes on a single router?
Answer: Yes, BGP supports multiple BGP instances like IPv4 and IPv6. VRFs and VPNs can run on the same router under the same BGP AS number, but you can only run one BGP AS number on a router. You cannot enable BGP with a different AS number if you are already running BGP.
What is the minimum subnet for BGP?
Answer: /48 is the minimum prefix size that will be routed globally in BGP. A prefix of this size is usually assigned to a customer network. /64 is the common size for one subnet.
How is BGP neighborship formed?
Answer: BGP forms a BGP session through a TCP connection on TCP Port 179 with its peers or neighbor routers. The BGP Finite State Machine (FSM) is used to maintain the BGP table, which contains the peers and operational status. To establish a BGP session, the BGP FSM may take the router through different BGP states.
Do devices have to be on the same subnet to communicate?
Answer: Computers need routers to communicate with devices that are not on their same logical subnet.
Can you have two subnets on the same router?
Answer: Most home routers aren’t capable of creating multiple subnets, but assuming you have a router that can, your router will only have 254 usable network addresses on a typical home network.
Do BGP neighbors have to be in the same subnet
Answer: Can does not require neighbours to be attached to the same subnet. Instead, BGP routers use a TCP connection between the routers to pass BGP message allowing neighbouring routers to be on the same or different subnet.
What are the requirements for BGP neighbor relationship
There are several requirements for forming BGP neighbors:-A local router's autonomous system number must match the neighboring router's ASN.The BGP router ID of the two routers must not be the same.Each router must be part of a TCP connection.Authentication must be passing if it's configured.
Do BGP neighbors need to be directly connected
Neighbors do not have to be directly connected to each other. Because IBGP peers are not required to be directly connected, IBGP uses the IGP path (the IP next-hop learned from the IGP) to reach an IBGP peer for its peering connection.
Do OSPF neighbors have to be in the same subnet
The subnet mask must match in OSPF except for point-to-point interface types and virtual links!
Can my gateway be on a different subnet
actually, two interfaces do not need to be on the same subnet in order to talk to each other. The IP addresses can be completely different. Both routers will be able to ping each other.
Does each subnet need its own router
A subnet is just a range of IP addresses. All the devices in the same subnet can communicate directly with one another without going through any routers. In IPv4, a network interface is connected to only one subnet and has only one IP address.
Can I run two BGP process on a single router
Yes, BGP does multiple BGP instances like IPv4 and IPv6, VRFs and VPNs can run on the same router under same BGP AS number; those are called address families (address-family). However, you can only run 1 BGP AS number on a router. you cannot enable BGP with different AS number if yo already running BGP.
What is the minimum subnet for BGP
/48 is the minimum prefix size that will be routed globally in the BGP. A prefix of this size is usually assigned to a customer network. /64 is the common size for one subnet.
How BGP Neighborship is formed
BGP forms a BGP session through a TCP connection on TCP Port 179 with its peers or neighbor routers. The BGP Finite State Machine (FSM) is used to maintain the BGP table, which contains the peers and operational status. To establish a BGP session, the BGP FSM may take the router through the different BGP states.
Do devices have to be on the same subnet to communicate
Computers need routers to communicate with devices that are not on their same logical subnet.
Can you have two subnets on the same router
Most home routers aren't even capable of creating multiple subnets, but we will assume you have a really nice home router that can. Your router will only have 254 usable network addresses on a typical home network. Most routers have a network IP address of 192.168. 1.
Can a router route between subnets
Routers carry traffic from one network/subnet to another. Routers maintain a routing table to decide how to route the IP packets. Each routing entry consists of the destination address, subnet mask and "route to" field.
Does the gateway have to be on the same subnet
The gateway address must have the same subnet mask as host devices. Each host on the network uses the same gateway. The gateway should have a static address, as changing the address would cause packets not to be delivered.
Can a router have multiple BGP ASN
Yes, BGP does multiple BGP instances like IPv4 and IPv6, VRFs and VPNs can run on the same router under same BGP AS number; those are called address families (address-family). However, you can only run 1 BGP AS number on a router.
Which two conditions are valid reasons to run BGP in an AS
Which condition are valid reasons to run BGP in an AS The AS is an ISP. The AS has only a single connection to another AS. Path and packet flow manipulation is required in this AS.
Is BGP Layer 3 or 4
BGP in networking is based on the TCP/IP model. It operates on the Open Systems Interconnection transport layer (Layer 4) to control the network layer (Layer 3).
Do all routers run BGP
The answer is yes. BGP is the routing protocol of the Internet. BGP is how all Internet routers route your email and web requests across the Internet. Without BGP, no traffic would flow across the Internet and the Internet would be useless.
Which of the following commands causes a router to bring down BGP neighbor relationships
Explanation: The router resets the BGP neighborship when performing a hard reset of the peer.
How do I check my BGP neighborship
To display information about the TCP and BGP connections to neighbors, use the show ip bgp neighbors command in EXEC mode. Syntax Description address (Optional) Address of the neighbor whose routes you have learned from. If you omit this argument, all neighbors are displayed.
Can two different subnets communicate
Using a Router for Subnet Communication<
Using a router is another way to communicate between subnets. A router can help to route traffic between the different subnets. It can also help to ensure that the traffic is secure and that only authorized users are able to access the network.
What would allow devices on different subnets
Devices in different subnets can communicate. That is the purpose of a router. Routers route packets between different networks. Even if devices in different networks are on the same layer-2 broadcast domain, you need a router to let the devices communicate at layer-3.
Can a layer 3 switch route between subnets
Is it possible to route between two subnets using a layer 3 switch Yes, it is. You need to create VLANs for the subnets and route traffic (Inter-vlan routing) between them and than on the switch. A L3 switch is also a router so it understands Layer 3 routing.
Can you have a gateway outside your subnet
No, you cannot. The gateway IP tells the system how to get to another subnet, and without it, packets won't leave the current subnet. A computer only knows how to talk to the other computers that are directly connected on the same subnet.
Can you have multiple BGP process on single router
A BGP router can run multiple BGP processes. Each BGP process corresponds to a BGP instance. BGP maintains an independent routing table for each BGP instance. You can enable session multithreading for each BGP process.
Is it possible to run two BGP processes on the same router Why
Yes, BGP does multiple BGP instances like IPv4 and IPv6, VRFs and VPNs can run on the same router under same BGP AS number; those are called address families (address-family). However, you can only run 1 BGP AS number on a router. you cannot enable BGP with different AS number if yo already running BGP.
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