RSTP(Rapid Spanning Tree) is configured on a bridge. All ports of this bridge are "trunk" ports and are part of vlan “x”. Will the BPDUs sent out of this bridge be tagged?
In IPv4, fragmentation is done by routers on way to the destination if DF(do not fragment) flag is not set in the IP packet.
Once a packet is fragmented, its fragments may take different paths (due to various reasons like topology changes) to the destination.
If, on some link again in the path to destination, one routers find that the link MTU is smaller than the frame size, then either the packet needs to be fragmented or dropped.
Can fragments of a packet be refragmented again? If yes, what will be the value of MF flag in the new individual fragments created by this?
What will happen when an ARP Request packet is sent from router1 to router2 in the following two cases? Will an ARP Reply be generated or the ARP Request packet be dropped?
- [router1]Intf1(20.0.0.1/24) ======== (40.0.0.1/24)Intf2[router2]
- [router1]Intf1(20.0.0.1/24) ======== (20.0.0.2/8) Intf2[router2]
The topology above have a port "Intf1" on router "router1" connected a port "Intf2" on another router "router2" via a direct link(eg, a 1 Gbps cable).
If the host, for which an ARP table entry is present on the connected router, has changed its NIC(so that its MAC address has changed), what will happen when a packet is sent out on the link with the old MAC address by the router?
Will any kind of error message(like ICMP) be generated at layer2/3? If yes, what will be its SIP and DIP?