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Regarding types of bridging/bridges

Hi All,

I'm reading Richard Deals book for my CCNA. While i was re-reading the bridging part. I came across the below shaded lines.

Do  we still use such types of bridges/bridging methods ? Is it useful to  dig into understand these type of bridging operations too not only for  my ccna but also for my networking knowledge?

Can someone please explain ?

brid.PNG

Thanks in advance.

Regards,
Chandu       

Regards, Chandu
1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Regarding types of bridging/bridges

  I don't think it's very common today as IP and Ethernet have taken almost all of the market. Cisco devices support fallback bridging and IRB.

Fallback bridging:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_35_se/configuration/guide/swfallbk.pdf

This can be used to bridge between routed ports or SVIs for non routable traffic from legacy protocols.

IRB:

http://www.cisco.com/en/US/tech/tk389/tk815/technologies_tech_note09186a0080094663.shtml

IRB can be used to bridge on some interfaces and also route traffic for remote networks.

One application could be to bridge VLANs towards a firewall and still route traffic for other networks.

Daniel Dib
CCIE #37149

Please rate helpful posts.

Daniel Dib CCIE #37149 Please rate helpful posts.
1 REPLY
Silver

Regarding types of bridging/bridges

  I don't think it's very common today as IP and Ethernet have taken almost all of the market. Cisco devices support fallback bridging and IRB.

Fallback bridging:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_35_se/configuration/guide/swfallbk.pdf

This can be used to bridge between routed ports or SVIs for non routable traffic from legacy protocols.

IRB:

http://www.cisco.com/en/US/tech/tk389/tk815/technologies_tech_note09186a0080094663.shtml

IRB can be used to bridge on some interfaces and also route traffic for remote networks.

One application could be to bridge VLANs towards a firewall and still route traffic for other networks.

Daniel Dib
CCIE #37149

Please rate helpful posts.

Daniel Dib CCIE #37149 Please rate helpful posts.
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