Shared risk group (SRG)

Table with one row for each element of the type: 'Shared risk group (SRG)'.

Columns

Name	Description
Failing elements (static)	The elements specifically and statically assigned to this SRG as failing elements, that will be down when this SRG is activated
Description	A user-defined text description (potentially long) that can be assigned to this element
All: Sum OTU blocking (Gbps)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Sum of the capacity of the blocked OTUs in this SRG (Gbps)
Attributes	User-defined attributes associated to this element
FTT: Worst VPN blocking (%)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Worst blocking percentage among the VPNs in this SRG (%)
MTTF (days)	Mean Time to Fail, measured in days. The average time between the SRG is repaired (after a failure), and the next failure occurs
Name	A user-defined name (typically short) that can be assigned to this element
All: Worst multicast blocking (%)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Worst blocking percentage among the multicast flows in this SRG (%)
All: Worst VPN blocking (%)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Worst blocking percentage among the VPNs in this SRG (%)
All: Worst OTU latency excess (ms)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Worst excess in latency of any OTU respect to its declared maximum tolerable latency (ms), in this SRG
Identifier	A unique identifier set to the element, and never changed
All: Sum ODU blocking (Gbps)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Sum of the capacity of the blocked ODUs in this SRG (Gbps)
Sum IP dropped traffic (Gbps)	Sum of the IP traffic dropped at the IP ports, because of congestion or QoS violation, in this SRG
% Time ok	The percentage of time that this risk or SRG is not happening (i.e. not failed). This is directly calculated from the MTTF and MTTR values
Failing IP adjacencies (dynamic)	A set of IP adjacencies (where an adjacency is represented by its two end nodes), so when this SRG fails, all the IP links of the adjacency simultaneously fail. This SRG is tagged as 'dynamic' since in the network design algorithm, it assumes that all the IP links associated to an adjacency fails, and adding more capacity (e.g. new IP links) to that adjancency would not help.
MTTR (days)	Mean Time to Repair, measured in hours. The average time between the SRG fails, and the failure is repaired so the underlying system/s are active again
FTT: Worst IP demands latency excess (ms)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Worst excess in latency of any IP demand respect to its declared maximum tolerable latency (ms), in this SRG
All: Worst multicast latency excess (ms)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Worst excess in latency of any multicast flow respect to its declared maximum tolerable latency (ms), in this SRG
All: Worst ODU latency excess (ms)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Worst excess in latency of any ODU respect to its declared maximum tolerable latency (ms), in this SRG
All: Worst IP demands latency excess (ms)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Worst excess in latency of any IP demand respect to its declared maximum tolerable latency (ms), in this SRG
External links	Indicates if this element has one or more user-defined external URLs associated to it. If so, when the user clicks this cell, and selects the URL (if more than one), a navigator is launched and the URL page is shown. External links are not editable in the GUI, but via API.
FTT: Sum IP demands blocked traffic (Gbps)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Sum of demands blocked traffic (Gbps) in this SRG
Tags	User-defined tags associated to this element
Failing IP adjacencies	A set of IP adjacencies (where an adjacency is represented by its two end nodes), so when this SRG fails, all the IP links of the adjacency simultaneously fail. This SRG is tagged as 'dynamic' since in the network design algorithm, it assumes that all the IP links associated to an adjacency fails, and adding more capacity (e.g. new IP links) to that adjancency would not help.
FTT: Worst multicast latency excess (ms)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Worst excess in latency of any multicast flow respect to its declared maximum tolerable latency (ms), in this SRG
FTT: Sum OTU blocking (Gbps)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Sum of the capacity of the blocked OTUs in this SRG (Gbps)
JSON	An optional JSON content describing this element
All failing elements	The elements that fail when this SRG is activated. This includes both the failing elements statically assigned to this SRG, as well as the transport connection associated to failing IP adjacencies (if any)
SRG types	The SRG types that this SRG belongs to
FTT: Worst OTU latency excess (ms)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Worst excess in latency of any OTU respect to its declared maximum tolerable latency (ms), in this SRG
FTT: Sum ODU blocking (Gbps)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Sum of the capacity of the blocked ODUs in this SRG (Gbps)
FTT: Worst multicast blocking (%)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Worst blocking percentage among the multicast flows in this SRG (%)
All: Sum IP demands blocked traffic (Gbps)	[Applied to all elements: those that have this SRG in its fault-tolerance-target (FTT) or not] Sum of demands blocked traffic (Gbps) in this SRG
FTT: Worst ODU latency excess (ms)	[Restricted to the elements that have this SRG in its fault-tolerance-target (FTT)] Worst excess in latency of any ODU respect to its declared maximum tolerable latency (ms), in this SRG

Views

Name	Columns	Description
Full view	Name, Identifier, Description, ExternalLinks, Mttf(days), Mttr(days), %TimeOk, SrgTypes, AllFailingElements, FailingElements(static), FailingIpAdjacencies(dynamic), FailingIpAdjacencies, SumIpDroppedTraffic(gbps), Ftt:SumIpDemandsBlockedTraffic(gbps), Ftt:WorstIpDemandsLatencyExcess(ms), Ftt:WorstMulticastBlocking(%), Ftt:WorstMulticastLatencyExcess(ms), Ftt:WorstVpnBlocking(%), Ftt:SumOduBlocking(gbps), Ftt:WorstOduLatencyExcess(ms), Ftt:SumOtuBlocking(gbps), Ftt:WorstOtuLatencyExcess(ms), All:SumIpDemandsBlockedTraffic(gbps), All:WorstIpDemandsLatencyExcess(ms), All:WorstMulticastBlocking(%), All:WorstMulticastLatencyExcess(ms), All:WorstVpnBlocking(%), All:SumOduBlocking(gbps), All:WorstOduLatencyExcess(ms), All:SumOtuBlocking(gbps), All:WorstOtuLatencyExcess(ms), Tags, Attributes, Json	This table view corresponds to a view with all the table columns. In some occassions, this may imply an impractically large number of columns for human inspection.
Risk analysis (FTT)	SrgTypes, AllFailingElements, FailingElements(static), FailingIpAdjacencies(dynamic), SumIpDroppedTraffic(gbps), Ftt:SumIpDemandsBlockedTraffic(gbps), Ftt:WorstIpDemandsLatencyExcess(ms), Ftt:WorstMulticastBlocking(%), Ftt:WorstMulticastLatencyExcess(ms), Ftt:WorstVpnBlocking(%), Ftt:SumOduBlocking(gbps), Ftt:WorstOduLatencyExcess(ms), Ftt:SumOtuBlocking(gbps), Ftt:WorstOtuLatencyExcess(ms)	Columns conveying information on the network risk analysis, associated to the risk situations inside the fault-tolerance target defined for this element
Risk analysis (non FTT)	SrgTypes, AllFailingElements, FailingElements(static), FailingIpAdjacencies(dynamic), All:SumIpDemandsBlockedTraffic(gbps), All:WorstIpDemandsLatencyExcess(ms), All:WorstMulticastBlocking(%), All:WorstMulticastLatencyExcess(ms), All:WorstVpnBlocking(%), All:SumOduBlocking(gbps), All:WorstOduLatencyExcess(ms), All:SumOtuBlocking(gbps), All:WorstOtuLatencyExcess(ms)	Columns conveying information on the network risk analysis, associated to all the risk situations, i.e. those inside the fault-tolerance target defined for this element, or not
Connectivity	SrgTypes, AllFailingElements, FailingElements(static), FailingIpAdjacencies(dynamic), FailingIpAdjacencies	Columns associated to the element related paths, links, neighbor nodes and alike
Description & tags & attributes	Name, Identifier, Description, ExternalLinks, SrgTypes, AllFailingElements, FailingElements(static), FailingIpAdjacencies(dynamic), Tags, Attributes, Json	Columns associated to side information like element names, descriptions, user associated tags or attributes
KPIs	Mttf(days), Mttr(days), %TimeOk, SrgTypes, AllFailingElements, FailingElements(static), FailingIpAdjacencies(dynamic)	Columns associated to traffic-related KPIs of the multicast flows
Default view	%TimeOk, SrgTypes, AllFailingElements, FailingElements(static), FailingIpAdjacencies(dynamic), SumIpDroppedTraffic(gbps), All:SumIpDemandsBlockedTraffic(gbps), Tags	This table view corresponds to a subset of columns selected as representative for a default table view. They typically include the most typical required values

Table right-click menu

• Set for selected elements...: Menu with options for setting values to different parameters of the selected elements
  • Value at column 'Name': This option sets the value at column 'Name'
  • For selected elements: Set the value at column 'Name' for: Selected elements (The elements already selected by the user in the table before calling this action)
  • For all table elements: Set the value at column 'Name' for: All table elements (All the elements in the table, not applying any filter, and not considering any pagination)
  • Value at column 'Identifier': This option sets the value at column 'Identifier'
  • For selected elements: Set the value at column 'Identifier' for: Selected elements (The elements already selected by the user in the table before calling this action)
  • For all table elements: Set the value at column 'Identifier' for: All table elements (All the elements in the table, not applying any filter, and not considering any pagination)
  • Value at column 'Description': This option sets the value at column 'Description'
  • For selected elements: Set the value at column 'Description' for: Selected elements (The elements already selected by the user in the table before calling this action)
  • For all table elements: Set the value at column 'Description' for: All table elements (All the elements in the table, not applying any filter, and not considering any pagination)
  • Value at column 'MTTF (days)': This option sets the value at column 'MTTF (days)'
  • For selected elements: Set the value at column 'MTTF (days)' for: Selected elements (The elements already selected by the user in the table before calling this action)
  • For all table elements: Set the value at column 'MTTF (days)' for: All table elements (All the elements in the table, not applying any filter, and not considering any pagination)
  • Value at column 'MTTR (days)': This option sets the value at column 'MTTR (days)'
  • For selected elements: Set the value at column 'MTTR (days)' for: Selected elements (The elements already selected by the user in the table before calling this action)
  • For all table elements: Set the value at column 'MTTR (days)' for: All table elements (All the elements in the table, not applying any filter, and not considering any pagination)
  • Value at column 'SRG types': This option sets the value at column 'SRG types'
  • For selected elements: Set the value at column 'SRG types' for: Selected elements (The elements already selected by the user in the table before calling this action)
  • For all table elements: Set the value at column 'SRG types' for: All table elements (All the elements in the table, not applying any filter, and not considering any pagination)
  • Value at column 'Failing IP adjacencies': This option sets the value at column 'Failing IP adjacencies'
  • For selected elements: Set the value at column 'Failing IP adjacencies' for: Selected elements (The elements already selected by the user in the table before calling this action)
  • For all table elements: Set the value at column 'Failing IP adjacencies' for: All table elements (All the elements in the table, not applying any filter, and not considering any pagination)
• Add...: Options to add new SRGs to the design
  • Add empty SRG: Adds an empty SRG with no failing resources associated
  • Add SRGs for each tagged element: Adds one SRG for each element with the indicated tag, that is suitable to be part of a SRG
  • Add SRGs for node type: Options to add one SRG for each node of selected type
  • One SRG per node of given type: Adds a new SRG for each existing node of user selected type
  • Add SRGs from model: Options to add SRGs according to different automatic models
  • One SRG per internal IP node: Adds one SRG for each IP internal node
  • One SRG per bidirectional injection link: Adds one SRG for each bidirectional injection link
    • Given MTTF/MTTR: The MTTF and MTTR parameters are manually set as constant
    • MTTF proportional to length: The MTTR is constant and manually set, but the MTTF is computed for each SRG as a function of the link length
  • One SRG per IP adjacency: Adds one SRG for each node pair among the selected IP nodes, so all the IP ports with IP links between them fail
  • One SRG per WDM link: Adds one SRG for each WDM link. If the link is bidirectional, one SRG is created covering both opposite bidirectional links
    • Given MTTF/MTTR: The MTTF and MTTR parameters are manually set as constant
    • MTTF proportional to length: The MTTR is constant and manually set, but the MTTF is computed for each SRG as a function of the link length
  • One SRG per VTL link: Adds one SRG for each VTL (Virtual Transport Link). If the link is bidirectional, one SRG is created covering both opposite bidirectional links
• Remove: Different remove options
  • Selected elements: Remove elements: Selected elements (The elements already selected by the user in the table before calling this action)
  • All table elements: Remove elements: All table elements (All the elements in the table, not applying any filter, and not considering any pagination)
• Fail all elements in the SRGs: All the failable elements associated to the selected SRGs are set as failed.
• Repair all elements in the SRG: All the failable elements associated to this SRG are set as not failed.
• Tags: Different menu options related to user-defined tags
  • Add tag: Adds a user-defined tag to the indicated elements
  • Remove tag: Removes a user-defined tag from the indicated elements
  • Remove all tags: For all the indicated elements, all their tags are removed
• Attributes: Different menu options related to user-defined attributes
  • Add attribute: Adds a user-defined attribute (key-value pair) to all the selected elements. Any attribute with the same key is replaced by the new value.
  • Remove attribute: Removes a user-defined attribute (key-value pair) from all the selected elements.
  • Remove all attributes: Removes all the user-defined attributes (key-value pair) from the indicated elements.

Form-required interactions

Shared risk group (SRG)-AddSrgFromTag

Form to complete:

• Tag: One SRG is added for each element with this tag, that is suitable to be part of an SRG (e.g. nodes, ports, transport links).
• MTTF (days): The Mean Time To Fail measured in days for this SRG. This is the time since it got repaired and started working, until next failure occurs..
• MTTR (days): The Mean Time To Repair measured in days for this SRG. This is the time since the system is down since it failed, and it gets up once the repair is completed.
• Remove existing SRGs: If checked, the existing SRGs will be removed before this new SRGs are added.

Shared risk group (SRG)-AddSrgPerNodeType

Form to complete:

• Node type: The type of node. One SRG is created for all the nodes of this type.
• Node tag: Optionally, a tag, so only the nodes that have a tag which contains the given string are selected.

Shared risk group (SRG)-AddSrgFromModel-OnePerIpNode

Form to complete:

• Elements tag: If set, only the elements with this tag are selected. If not, all the elements are selected.

• MTTF (days): The Mean Time To Fail measured in days for this SRG. This is the time since it got repaired and started working, until next failure occurs..

• MTTR (days): The Mean Time To Repair measured in days for this SRG. This is the time since the system is down since it failed, and it gets up once the repair is completed.
• Remove existing SRGs: If checked, the existing SRGs will be removed before this new SRGs are added.

Shared risk group (SRG)-AddSrgFromModel-TrueOnePerBidiInjectionLink

Form to complete:

• Elements tag: If set, only the elements with this tag are selected. If not, all the elements are selected.

• MTTF (days): The Mean Time To Fail measured in days for this SRG. This is the time since it got repaired and started working, until next failure occurs..

• MTTR (days): The Mean Time To Repair measured in days for this SRG. This is the time since the system is down since it failed, and it gets up once the repair is completed.
• Remove existing SRGs: If checked, the existing SRGs will be removed before this new SRGs are added.

Shared risk group (SRG)-AddSrgFromModel-FalseOnePerBidiInjectionLink

Form to complete:

• Elements tag: If set, only the elements with this tag are selected. If not, all the elements are selected.

• Failures per year every 1000 km: Number of failures per year that occur in average in each link.

• MTTR (days): The Mean Time To Repair measured in days for this SRG. This is the time since the system is down since it failed, and it gets up once the repair is completed.
• Remove existing SRGs: If checked, the existing SRGs will be removed before this new SRGs are added.

Shared risk group (SRG)-AddSrgFromModel-OnePerDynamicIpNodePair

Form to complete:

• Elements tag: If set, only the elements with this tag are selected. If not, all the elements are selected.

• MTTF (days): The Mean Time To Fail measured in days for this SRG. This is the time since it got repaired and started working, until next failure occurs..

• MTTR (days): The Mean Time To Repair measured in days for this SRG. This is the time since the system is down since it failed, and it gets up once the repair is completed.
• Remove existing SRGs: If checked, the existing SRGs will be removed before this new SRGs are added.

Shared risk group (SRG)-AddSrgFromModel-TrueOnePerBidiWdmLink

Form to complete:

• Elements tag: If set, only the elements with this tag are selected. If not, all the elements are selected.

• MTTF (days): The Mean Time To Fail measured in days for this SRG. This is the time since it got repaired and started working, until next failure occurs..

• MTTR (days): The Mean Time To Repair measured in days for this SRG. This is the time since the system is down since it failed, and it gets up once the repair is completed.
• Remove existing SRGs: If checked, the existing SRGs will be removed before this new SRGs are added.

Shared risk group (SRG)-AddSrgFromModel-FalseOnePerBidiWdmLink

Form to complete:

• Elements tag: If set, only the elements with this tag are selected. If not, all the elements are selected.

• Failures per year every 1000 km: Number of failures per year that occur in average in each link.

• MTTR (days): The Mean Time To Repair measured in days for this SRG. This is the time since the system is down since it failed, and it gets up once the repair is completed.
• Remove existing SRGs: If checked, the existing SRGs will be removed before this new SRGs are added.

Shared risk group (SRG)-AddSrgFromModel-OnePerBidiVtl

Form to complete:

• Elements tag: If set, only the elements with this tag are selected. If not, all the elements are selected.

• MTTF (days): The Mean Time To Fail measured in days for this SRG. This is the time since it got repaired and started working, until next failure occurs..

• MTTR (days): The Mean Time To Repair measured in days for this SRG. This is the time since the system is down since it failed, and it gets up once the repair is completed.
• Remove existing SRGs: If checked, the existing SRGs will be removed before this new SRGs are added.

Network Controller-AddTag

Form to complete:

• Tag: The tag string.
• Applicable elements: This selector indicates the elements to which this action is going to be applied. Options:
  • Selected elements: The elements already selected by the user in the table before calling this action.
  • All table elements: All the elements in the table, not applying any filter, and not considering any pagination.

Network Controller-RemoveTag

Form to complete:

• Tag: The tag string.
• Applicable elements: This selector indicates the elements to which this action is going to be applied. Options:
  • Selected elements: The elements already selected by the user in the table before calling this action.
  • All table elements: All the elements in the table, not applying any filter, and not considering any pagination.

Network Controller-RemoveAllTags

Form to complete:

• Applicable elements: This selector indicates the elements to which this action is going to be applied. Options:
  • Selected elements: The elements already selected by the user in the table before calling this action.
  • All table elements: All the elements in the table, not applying any filter, and not considering any pagination.

Network Controller-AddAttribute

Form to complete:

• Key: The attributes key, or name.
• Value: The attribute value, to associate to the attribute name.
• Applicable elements: This selector indicates the elements to which this action is going to be applied. Options:
  • Selected elements: The elements already selected by the user in the table before calling this action.
  • All table elements: All the elements in the table, not applying any filter, and not considering any pagination.

Network Controller-RemoveAttribute

Form to complete:

• Key: The attributes key, or name.
• Applicable elements: This selector indicates the elements to which this action is going to be applied. Options:
  • Selected elements: The elements already selected by the user in the table before calling this action.
  • All table elements: All the elements in the table, not applying any filter, and not considering any pagination.

Network Controller-RemoveAllAttributes

Form to complete:

• Applicable elements: This selector indicates the elements to which this action is going to be applied. Options:
  • Selected elements: The elements already selected by the user in the table before calling this action.
  • All table elements: All the elements in the table, not applying any filter, and not considering any pagination.