Donald Eastlake 3rd

1
Future TRILL Work

• Donald Eastlake 3rd
• 1-508-786-7554
• Donald.Eastlake_at_motorola.com

2
Future TRILL Work

• Potential Future TRILL Work/Documents
• Management (MIB)
• ARP/ND/IP/ Optimization
• 802.1 Features
• Customer versus Service Rbridges (802.1ad)
• Connectivity Fault Management (802.1ag)
• Congestion Notification (802.1Qau)
• Enhanced Transmission Selection (per priority
  pause, 802.1Qaz)

3
Questions on These Work Items

• Is the item important/high-value?
• Is the item urgent/time-sensitive?
• Who would like to work on it?

4
Management (MIB)

• Possible components
• Bridge MIB stuff (from RFC 4188?)
• IS-IS MIB stuff (from RFC 4444?)
• IP Multicast stuff (from RFC 5132?)
• RBridge stuff
• Nickname configuration
• End station address learning priorities

5
IP Related Optimizations

• ARP/ND optimization was included in the paper
  cited in our Charter and in early protocol drafts
  but was removed from base specification by WG
  consensus, to be placed in a separate document.
• Included learning IP addresses and sometimes
  responding to ARP/ND.

6
Customer/Service RBridges

• IEEE 802.1ad-2005 Provider Bridges is a
  completed amendment to 802.1Q.
• (not to be confused with the in process 802.1ah
  Provider Backbone Bridges amendment)
• Provider Bridges outer S-Tags and are transparent
  to some bridging multicast addresses.
• Provider Edge Bridges talk C-Tags (formerly
  called Q-Tags) on customer ports and S-Tags on
  provider ports.
• Should it be possible to configure Rbridges as
  Provider or Provider Edge Bridges and/or
  incrementally replaced such bridges with RBridges?

7
Connectivity Fault Management

• 802.1ag current at Draft D8.1
• protocols to support transport fault
  management. These allow discovery and
  verification of the path, through bridges and
  LANs, taken for frames and isolation of a
  connectivity fault to a specific bridge or LAN.
  Networks are operated by multiple organizations,
  with restricted management access to each other's
  equipment. This standard provides capabilities
  for detecting, verifying and isolating
  connectivity failures ...
• Can Rbridges support 802.1ag? Do we want to
  provide similar facilities in a different way.

8
Congestion Notification (802.1Qau)

• Layer 2 method to rate limit flows causing
  congestion.
• Has been progressing slowly in 802.1 but an
  update from Draft D0.4 to Draft D0.2 was
  authorized last week.
• Some changes to Rbridges beyond those required in
  802.1 Bridges would be required to support
  802.1Qau.
• For example, a congestion control message in
  response to a TRILL data frame should get back to
  the true origin station, not just the ingress
  RBridge.

9
Enhanced Transmission Selection (802.1Qaz)

• Also know in 802.1 as per priority pause or
  PPP.
• Permits separately pausing and un-pausing
  different traffic class queues, distinguished by
  priority, to enforce bandwidth quotas and the
  like.