Routing Dimensions

Dimensions related to traffic routing are listed in the following topics:

Notes:
- The categorization of dimensions in the topics below corresponds to the categories by which the dimensions are shown in the Dimension Selector Dialog (part of the ad hoc filter controls in the Filtering Options dialog).
- Except where noted, the dimensions listed in the tables below are available for both filtering and group-by.
- The value type refers to the data type (text, integer, etc.) of the dimension value.
- The column type refers to whether the dimension is literally stored in KDE (native) or derived at query-time from other KDE-stored information (virtual); see KDE Query Efficiency.
- The KDE name(s) given below, which represent the KDE column(s) corresponding to each dimension, may be used in API queries made with the Query SQL Method.
- As indicated by column type, some columns are native (actually stored in the backend) while others are virtual (derived from other information). In general, filtering with dimensions based on native columns will return results faster than filtering with dimensions based on virtual columns.

 

IP and BGP Routing

The dimensions in this category are used to filter or group-by on IP addresses (Ipv4 or Ipv6), protocol (e.g. TCP or UDP), TCP flags, and ToS, as well as routing information including source and destination AS, AS path, AS names, community, prefixes, and hops.

 
top  |  section

IP Info Dimensions

Dimensions related to IP properties:

Dimension
name (portal)
Description Type:
value
column
Direction
KDE name(s)
IP/CIDR The source/destination IP address, either IPv4 or IPv6, of the flow. string
Native
Src/Dst:
inet_src_addr
inet_dst_addr
Protocol The number of the protocol. See https://en.wikipedia.org/wiki/List_of_IP_protocol_numbers integer
Native
Non-directional:
protocol
Hostname The host name returned from a DNS lookup of an IP address in a flow record from a kproxy agent. string
Native
Src/Dst:
kt_src_dns_hostname
kt_dst_dns_hostname
Protocol Name The name of the protocol followed by the corresponding protocol number in parentheses, e.g. TCP (6). In SQL, supports case-insensitive equality and IN matching. string
Virtual
Non-directional:
i_protocol_name
Port Number Layer 4 source/destination port (e.g. 80, 443). integer
Virtual
Src/Dst:
l4_src_port
l4_dst_port
INET Family The address family of the flow, either 4 (IPv4) or 6 (IPv6). integer
Native
Non-directional:
inet_family
DSCP A DSCP (differentiated services code point) value from the DS field in a packet's IP header, which classifies the packet's contents to enable differentiated QoS. integer
Native
Non-directional:
dscp
TOS/Diffserv An 8-bit value, typically made up of a six-bit Differentiated Services Code Point (DSCP) field and a two-bit Explicit Congestion Notification (ECN) field. integer
Native
Non-directional:
tos

 
top  |  section

BGP Dimensions

Dimensions related to BGP properties (see About Kentik BGP):

Dimension
name (portal)
Description Type:
value
column
Direction
KDE name(s)
Route Prefix The BGP table prefix, either IPv4 or IPv6, that contains the source/destination IP of the flow. string
Native
Src/Dst:
inet_src_route_prefix
inet_dst_route_prefix
Route LEN The BGP prefix length for the source/destination IP of the flow. integer
Native
Src/Dst:
src_route_length
dst_route_length
AS Number The origin ASN associated with the source/destination IP of the flow. bigint
Native
Src/Dst:
src_as
dst_as
AS Name The name associated with AS Number. string
Virtual
Src/Dst:
i_src_as_name
i_dst_as_name
AS Group A label assigned to a collection of ASes (see About AS Groups). string
Virtual
Src/Dst:
kt_src_as_group
kt_dst_as_group
Next Hop IP/CIDR The BGP next-hop IP address, either IPv4 or IPv6, for the source/destination IP of the flow (see About BGP). string
Native
Src/Dst:
inet_src_next_hop
inet_dst_next_hop
Next Hop AS Number The ASN in the first position of the AS_PATH for the source IP of the flow (see About BGP). integer
Native
Src/Dst:
src_nexthop_as
dst_nexthop_as
Next Hop AS Name Name of Next Hop AS Number string
Virtual
Src/Dst:
i_src_nexthop_as_name
i_dst_nexthop_as_name
2nd Hop AS Number The ASN in the second position of the AS_PATH for the source/destination IP of the flow (see About BGP). integer
Native
Src/Dst:
src_second_asn
dst_second_asn
2nd Hop AS Name Name of 2nd Hop AS Number. string
Virtual
Src/Dst:
i_src_second_asn_name
i_dst_second_asn_name
3rd Hop AS Number The ASN in the third position of the AS_PATH for the source/destination IP of the flow (see About BGP). integer
Native
Src/Dst:
src_third_asn
dst_third_asn
3rd Hop AS Name Name of 3rd Hop AS Number. string
Virtual
Src/Dst:
i_src_third_asn_name
i_dst_third_asn_name
AS Path The BGP ASPATH for the flow’s source/destination IP (see About BGP). string
Native
Src/Dst:
src_bgp_aspath
dst_bgp_aspath
BGP Community The set of BGP communities associated with the flow’s source/destination IP (see About BGP). string
Native
Src/Dst:
src_bgp_community
dst_bgp_community
RPKI Validation Status The RPKI (Resource Public Key Infrastructure; see https://rpki.readthedocs.io/en/latest/) status of a prefix in a BGP-advertised route, which indicates whether the route would be used or dropped if the router were configured to enforce strict route validation. string
Virtual
Dst:
i_dst_rpki_name
RPKI Quick Status Provides a simplified view of RPKI status, enabling easier determination of the action to take on the prefix. string
Virtual
Dst:
i_dst_rpki_min_name

 
top  |  section

VRF Dimensions

Dimensions related to VRF properties:

Dimension
name (portal)
Description Type:
value
column
Direction
KDE name(s)
VRF Name The locally significant name of the VRF via which this flow was routed (input or output).
Note: VRF names may vary in different contexts.
string
Virtual
Src/Dst:
i_input_vrf
i_output_vrf
VRF Route Distinguisher Uniquely identifies the VRF via which this flow was routed (input or output). string
Virtual
Src/Dst:
i_input_vrf_rd
i_output_vrf_rd
VRF Route Target Uniquely identifies a shared route (used by multiple VRFs) via which this flow was routed (input or output). string
Virtual
Src/Dst:
i_input_vrf_rt
i_output_vrf_rt
VRF Extended Route Distinguisher An encoding of the VRF route distinguisher (for Kentik internal use only). integer
Native
Src/Dst:
input_vrf
output_vrf

 
top  |  section

Per-flow Metrics

These metrics are available as dimensions that can be used to filter or group-by based on stats related to the bytes and packets of the flow.

Dimension
name (portal)
Description Type:
value
column
Direction
KDE name(s)
Packet Size Packet size of flow (bytes/packet). integer
Native
Non-directional:
sampledpktsize
Packet Size (nearest 100) Packet size of flow (bytes/packets) rounded down to the nearest multiple of 100. integer
Native
Non-directional:
sampledpktsize_100
Sampling Rate * 100 The rate at which traffic was sampled when flow was collected (see Flow Sampling). integer
Native
Non-directional:
sample_rate

 

MPLS Dimensions

Multiprotocol Label Switching (MPLS) is a routing scheme for network data that enables network operators to define label-switched paths that let routers move packets within the network without consulting a routing table at each hop (see Using MPLS). The following table shows the MPLS-related dimensions that may be used for filtering or group-by in queries:

Dimension
name (portal)
Description Type:
value
column
Direction
MPLS Forwarding Type This field denotes the label distribution scheme used by the router to forward the MPLS traffic. Currently only Cisco ASR devices export this field. integer
UDR
Non-directional
MPLS Forwarding Address The IP address of the destination PE (provider edge) router where the flow will exit the MPLS domain before re-entering standard IP forwarding domains. integer
UDR
Non-directional
MPLS Forwarding Address Prefix Length The prefix length for the destination Forwarding Address of the flow. integer
UDR
Non-directional
MPLS Label 1 The value of the top label assigned to the flow. integer
UDR
Non-directional
MPLS Label 1 EXP The value of the experimental bits assigned to the flow. Typically this is used to map IP-based Quality of Service (QoS) markings into MPLS domains so that routers can apply appropriate forwarding policies to MPLS flows. integer
UDR
Non-directional
MPLS Label 2 The value of the second label assigned to the flow. integer
UDR
Non-directional
MPLS Label 2 EXP The value of the experimental bits assigned to the flow. Typically this is used to map IP-based Quality of Service (QoS) markings into MPLS domains so that routers can apply appropriate forwarding policies to MPLS flows. integer
UDR
Non-directional
Forwarding Status The two-bit forwarding status of the flow and associated six-bit reason code or flag. This dimension represents IPFIX entity 89 (IANA). integer
Native
Non-directional
© 2014- Kentik

In this article: