Embed Size (px)
Citation preview
TRILL OAMdraft-eastlake-trill-rbridge-channel-00
draft-bond-trill-rbridge-oam-01draft-manral-trill-bfd-encaps-01
Donald Eastlake 3rd
Huawei Technologies
[email protected] March 2011 1TRILL OAM
Vishwas ManralIP Infusion
David Michael BondUNH IOL
Contents
• TRILL OAM– Layer 3 and Layer 2 OAM don’t work for TRILL
• An RBridge Channel• ICMP like OAM Facilities• TRILL BFD Support• Proposed WG Actions
March 2011 TRILL OAM 2
Operations, Administration, & Management
• TRILL OAM needs to operate in single and multiple hops unicast and multicast between and through TRILL protocol stacks on RBridges. It needs to provide:– TRILL error reporting (TRILL Header hop count exhausted,
egress nickname unreachable, …) and similar “ICMP-like” functions
– Rapid RBridge/link failure detection– RBridge level traceroute– RBridge level ping
OAM
March 2011 3TRILL OAM
Layer 3 OAMDoesn’t Work for TRILL
• RBridges are not required to have IP protocol stacks or IP addresses.
• Even if all RBridges in a campus did have IP protocol stacks, those stacks would not be involved in TRILL ingress, transit, or egress processing for through traffic, even for IP native frames.
March 2011 4TRILL OAM
OAM
Layer 2 OAMDoesn’t Work for TRILL
• Layer 2 OAM would only be applicable to the Layer 2 link between neighbor RBridges.– It can test the links and ports but not TRILL protocol stacks– Layer 2 protocols, such as 802.1ag, cannot pass through
RBridges in native form
• Different links in an RBridge campus can be different technologies.– For example, all, some, or none of the links in a campus
could be PPP or 802.1 or other…
March 2011 5TRILL OAM
OAM
Operations, Administration, & Management
OAM
March 2011 6TRILL OAM
Router
Bridge
RBridge RBridge
P = Ports and Fast Path LogicET = Ethernet stack possibly with 802.1ag OAM = GreenTR = TRILL protocol stack including TRILL OAM = RedIP = IP protocol stack including Layer 3 OAM = Black
P
P
P
PET
IP
TR TRET
Router
P
ET
IP
RBridge
P
TR
ET ET ET ET ET ET
Three Drafts1. Channel Draft provides a communications
path for inter-RBridge messages2. TRILL OAM draft provides ICMP like facilities3. BFD draft provides BFD Control and BFD Echo
March 2011 TRILL OAM 7
1. RBridge/OAM Channel
2. TRILL OAM 3. BFD for TRILL
Contents
• TRILL OAM• An RBridge Channel
– Inter-RBridge channel for OAM and other protocols
• ICMP like OAM Facilities• TRILL BFD Support• Proposed WG Actions
March 2011 TRILL OAM 8
An RBridge Channel
• RBridge Channel frames look like TRILL Data frames– If unicast they are routed to the egress nickname
• A special nickname “Any-RBridge” is available to guarantee delivery to neighbors regardless of the state of nicknames.
– If multi-destination, they are distributed over the tree identified by the egress nickname to all RBridges in the Inner.VLAN
March 2011 TRILL OAM 9
An RBridge Channel
• Inter-RBridge TRILL OAM frames are detected by an OAM-aware egress RBridge based on their Inner.MacDA: All-OAM-RBridges.
• If appropriate for the OAM protocol, messages can also be sent between RBridges and end stations.
• The following Ethertype will be available:– TRILL-OAM
March 2011 TRILL OAM 10
An RBridge Channel• TRILL OAM Frames are TRILL Data Frames:
• The TRILL OAM Message Header and Payload:
March 2011 TRILL OAM 11
Link Header TRILL Header Channel Header OAM Data Link Trailer
All-OAM-RBridges
InnerMacSA
TRILL-OAMEthertype
Flags, Version,OAM Protocol #
OAM Protocol Specific
An RBridge Channel
• 0 = Silent• 1 = Multi-Hop• 2 - 11 available
• 1 = Rbridge Channel Err• 2 = TRILL OAM• 3, 4 = BFD Control, Echo• 5 – 4,094 available
March 2011 TRILL OAM 12
SpecialInner.MacDA
InnerMacSA
TRILL-OAMEthertype
Flags, Version,OAM Protocol #
OAM Protocol Specific
12 bits of OAMHeader Flags
12 bit OAMProtocol Number
4 bit OAMHeader Version
4 bitERR Code
Contents
• TRILL OAM• An RBridge Channel• ICMP like OAM Facilities• TRILL BFD Support• Proposed WG Actions
March 2011 TRILL OAM 13
draft-bond-trill-rbridge-oam-01
• TRILL Traceroute– Based on hop count, similar to IP traceroute
• TRILL Ping– Similar to ICMP
• Error reporting functionality
draft-bond-trill-rbridge-oam-01
• Differences between 00 and 01– Reworked the document to use the OAM Channel
rather than an OAM option– Changed the frame formats to work within the
OAM Channel– Numerous minor typo corrections and wording
clarifications– Removed the route-respond traceroute– Combined all the error notifications into one OAM
Channel
Contents
• TRILL OAM• An RBridge Channel• ICMP like OAM Facilities• TRILL BFD Support• Proposed WG Actions
March 2011 TRILL OAM 16
TRILL BFD Support
• BFD Control protocol provides very low overhead continuity testing messages. Because of this low overhead, they can be sent frequently and thus rapidly detect failures.
• For RBridge OAM, BFD Control is sent via the RBridge Channel.
March 2011 TRILL OAM 17
TRILL BFD Support
• If support for BFD Echo is indicated through BFD Control, BFD Echo can be used to send a frame to a neighbor RBridge that is addressed back to yourself. That is, the ingress and egress nicknames in the TRILL Header are equal.
• See RFC 5880 and 5882 for general BFD information, RFC 5881 for BFD over IP.
March 2011 TRILL OAM 18
Contents
• TRILL OAM• An RBridge Channel• ICMP like OAM Facilities• TRILL BFD Support• Proposed WG Actions
March 2011 TRILL OAM 19
Proposed WG Actions
• Rename the “OAM Channel” to “RBridge Channel”
• Adopt these three drafts as TRILL working group drafts, retaining the three draft structure
March 2011 TRILL OAM 20
END
March 2011 21TRILL OAM
Donald Eastlake 3rd
Huawei Technologies
Vishwas ManralIP Infusion
David BondUNH IOL
![Chopin Devil's Trill Prelude[1]](https://img.pdfslide.us/doc/110x75/5695d0cc1a28ab9b0293edfc/chopin-devils-trill-prelude1.jpg)
