New answers tagged

0

To build secure , optimise. , reliable network we should use routers , switches and firewalls devices by connecting accordinglly to our design and as per business requirement we can secure our networks from threat hackers and moreover we can fullfill our business requirements as required ISP will provide internet connectivity feasibility .But its our ...


1

A good, if basic question. A single LAN or layer 2 domain can be defined as having the following characteristics: All hosts can directly address each other, using their layer 2 protocol address (In the case of Ethernet, it's called the MAC address). Any host can send a broadcast to all other hosts on the network. As the number of hosts increases, this ...


0

A routing protocol is a protocol between routers to exchange their routing information/tables. OSPF is one of those protocols that's very popular for internal route exchange (an interior gateway protocol IGP). Running a routing protocol is only necessary on a larger network where it becomes impractical to manually configure routes. ISPs need to exchange ...


2

SONET defines a physical layer (or variants thereof) and a common data link layer, similar to Ethernet. (Circuit-switching) SONET used to be a popular carrier technology but has largely been replaced by (packet-switching, much more efficient) Ethernet.


1

For nearly all modern purposes, it really doesn't matter. There is no "master/leader" role for LACP from my experience. The switch with the lower LACP system priority gets to choose which link are active when there's some sort of limitation on which links can be active in a bundle. For example, some systems will let you have 1G and 10G links in a ...


1

There's no master switch with LACP. The System ID is used to match ports belonging to the same trunk group. You should look up the original IEEE 802.1AX standard. It's free after registration on https://ieeexplore.ieee.org/browse/standards/get-program/page/series?id=68


2

There were, in fact, dedicated X.25 hardware switches produced by the likes of BBN (and others) in the late 70's and into the 80's. Pictures of this sort of thing would be the domain of various museums out there, as dedicated X.25 switches were retired by the early 90's (nb - obviously some amount of this stuff probably persisted in some dusty corner, likely ...


1

Historically, Frame and ATM used purpose built devices. X.25 is a bit before my time, so I don't know if anyone had hardware switches for it. Today, almost everything is done with "soft switch" gear -- i.e. software. A Cisco IOS router can be configured to perform frame-relay, atm, and x.25 switching. MPLS is functionally just a fancy [simpler, ...


2

Short vs long timeout expresses preference for LACPDU timeout - it's not negotiated. Each side sends LACPDUs according to its partner's timeout preference. See 802.1AX Clause 6.4.1: d) Periodic transmission of LACPDUs occurs if the LACP_Activity control of either the Actor or the Partner is Active LACP. These periodic transmissions will occur at either a ...


0

Most of the issues with Etherchannels (Link Aggregation) are because of misconfiguration. Keep in mind that the configuration of all physical interfaces has to match. Here's a look at some common parameters that need to match at both end to ensure LACP link to come up. We can see that device1 has been configured for LACP and device 2 for PAgP, it will don't ...


1

A. The media would need to be same. As in 1G Ethernet and 1G Fiber are not allowed. This isn't actually required in many implementations, but some vendors do restrict this. It may have technical reasons (different PCS sublayer variants for -T, -X, or -R, so different encoding engines/chips may be used) or just that the implementer is overly compliant. Many ...


-1

The point A is based in how the bits are send across the media, the copper cable send electrical signals and the fiber optic transport light. This is a mismatch let says of technologies in layer 1. The point B is refers that port channel cannot merge the Vlans allowed of the physical interfaces once you add to your ports to the port channel, only the ...


Top 50 recent answers are included