Report field descriptions

Destination or DestIP
The address of a destination host or network, followed by a slash and the net mask.
Gateway or Gw
The gateway used to send packets to the destination. If the value is 0.0.0.0 for an IPv4 entry or :: for an IPv6 entry, then the destination is directly reachable without needing to go through a gateway.
GwReachable
Indicates whether IPv6 neighbor unreachability detection has detected that the gateway is reachable. The gateway is the router that originates the router advertisement message containing the route.
Yes
Indicates that the gateway is reachable.
No
Indicates that the gateway is unreachable. When the gateway is unreachable, the route is not being used for routing. If an alternate route is available, this route is not installed in the routing table.
N/A
The value is displayed for direct prefix router advertisement routes. These routes do not have an associated gateway.
Flags or Flgs
The state of the route, which can have the following values:
G
The route uses a gateway.
H
The route is to a host rather than to a network.
I
The static route in a policy-based routing table is not valid because it is configured to use a link that is not defined in the stack for the same IP version as the route.
U
The route is up.

The following flags are mutually exclusive:

C
The route was created by a connection (not using a definition or a routing protocol). Routes to subnets or point-to-point destinations using interfaces over which OMPROUTE is active but has not yet established a routing protocol are considered connection routes.
D
The route was created dynamically by ICMP processing or router advertisements (IPv6).
O
The route was created by OSPF (includes OSPF external routes).
R
The route was created by RIP.
S
The route is a static route not replaceable by a routing daemon or router advertisements (IPv6).
Z
The route is a static route replaceable by dynamic routes learned by OMPROUTE or from router advertisements (IPv6).
Interface or Intf
The link or interface name for the route.
IntfActive
Indicates whether the interface for the route is active.
Yes
Indicates that the interface is active.
No
Indicates that the interface is not active. When the interface is not active, the route is not being used for routing. If an alternate route is available, this route is not installed in the routing table.
LifetimeExp
The time at which the IPv6 router advertisement route will be deleted. This lifetime can be extended by router-supplied information. The N/A value is displayed for routes that are advertised with an infinite lifetime.
MTU
The value of the maximum transmission unit (MTU). The value can be one of the following depending on the modifier with which the report that contains the MTU value is displayed:
  • In a report that is displayed by using neither the RADV modifier nor the RSTAT modifier:
    • If the route is active, this MTU value is the largest packet size that can be sent by using this route. If the packet is larger than the MTU value, the packet must be fragmented if fragmentation is permitted. If fragmentation is not permitted, the packet is dropped and an ICMP error is returned to the originator of the packet.
    • If the route is inactive and was configured by using the BEGINROUTES or RouteTable statement, this MTU value is the same as the MTU value that was configured for the route.
    • If the route is inactive and was not configured by using the BEGINROUTES or RouteTable statement, this MTU value is either the link MTU value that is received in a router advertisement message for IPv6 routes only or 0.
  • In a report that is displayed by using the RADV modifier, this MTU value is the link MTU value that is received in a router advertisement message or 0 if no link MTU value was received.
  • In a report that is displayed by using the RSTAT modifier, this MTU value is the MTU value that was configured for the route by using the BEGINROUTES or RouteTable statement.
Metric
Displays the metric of the route. For static routes, direct routes have a metric of 0 and indirect routes have a metric of 1. If a route was learned from a routing daemon, the displayed metric is the metric that is set by the routing daemon. If a route was learned from an IPv6 router advertisement, the metric value is one of the following values:
1
When the router advertisement indicates a high preference.
2
When the router advertisement indicates a medium preference.
3
When the router advertisement indicates a low preference.
After the routes are in the stack routing table, the Metric field is not used. The routing daemons use metrics to compare routes and to inform the stack only of the routes that have the best metric.
Maximum retransmit time (MaxReTransmitTime)
The TCP retransmission interval in seconds for this route. If this parameter was not defined for the route, the default value of 120 seconds is displayed. This parameter does not affect initial connection retransmission.
Minimum retransmit time (MinReTransmitTime)
The minimum retransmit interval in seconds for this route. If this parameter was not defined for the route, the default value 0.5 (500 milliseconds) seconds is displayed.
Reference count (RefCnt)
The current number of active users for the route.
Round trip gain (RoundTripGain)
The percentage of the latest round trip time (RTT) to be applied to the smoothed RTT average. The higher this value, the more influence the latest packet RTT has on the average. If this parameter was not defined for the route, the default value 0.125 is displayed. This parameter does not affect initial connection retransmission.
Variance gain (VarianceGain)
The percentage of the latest RTT variance from the RTT average to be applied to the RTT variance average. The higher this value, the more influence the latest packet's RTT has on the variance average. If this parameter was not defined for the route, the default value 0.25 is displayed. This parameter does not affect initial connection retransmission.
Variance multiplier (VarianceMultiplier)
This value is multiplied against the RTT variance in calculating the retransmission interval. [The higher this value, the more effect variation in RTT has on calculating the retransmission interval.] If this parameter was not defined for the route, the default value 2 is displayed. This parameter does not affect initial connection retransmission.
DelayAcks
Indicates whether the DELAYACKS option is enabled or disabled. The value Yes indicates that acknowledgments are delayed when a packet is received (the DELAYACKS parameter was defined for the route). The value No indicates that acknowledgements are not delayed when a packet is received (the NODELAYACKS parameter was defined for the route).
Policy Routing Table
The name of the policy-based routing table being displayed.
IgnorePathMtuUpdate
IPv4
Indicates whether IPv4 ICMP Fragmentation Needed messages are ignored for this routing table. See the IgnorePathMtuUpdate parameter on the RouteTable statement in the z/OS Communications Server: IP Configuration Reference for more information. This field can have the following values:
Yes
IPv4 ICMP Fragmentation Needed messages are ignored for this routing table.
No
IPv4 ICMP Fragmentation Needed messages are processed for this routing table.
N/A
This value is displayed when either the routing table is not configured for IPv4 routing or only IPv6 routing information is being displayed for the table.
IPv6
Indicates whether IPv6 ICMP Packet Too Big messages are ignored for this routing table. See the IgnorePathMtuUpdate6 parameter on the RouteTable statement in the z/OS Communications Server: IP Configuration Reference for more information. This field can have the following values:
Yes
IPv6 ICMP Packet Too Big messages are ignored for this routing table.
No
IPv6 ICMP Packet Too Big messages are processed for this routing table.
N/A
This value is displayed when either the routing table is not configured for IPv6 routing or only IPv4 routing information is being displayed for the table.
MultiPath
IPv4
The information in this field is divided into two parts. The value before the parentheses indicates whether the multipath routing selection algorithm for outbound IPv4 traffic is enabled for this policy-based routing table. See the multipath parameter on the RouteTable statement in the z/OS Communications Server: IP Configuration Reference for more information. The possible values for the MultiPath field are:
Pkt
Indicates that outbound IPv4 traffic uses the round-robin distribution method to use multipath routes for each outbound packet.
Conn
Indicates that outbound IPv4 traffic uses the round-robin distribution method to use multipath routes for each outbound connection request.
No
Indicates that outbound IPv4 traffic always uses the first active route in a multipath group.
N/A
This value is displayed when either the routing table is not configured for IPv4 routing or only IPv6 routing information is being displayed for the table.
The value inside the parentheses identifies where the multipath value was obtained. The possible values are:
Profile
Indicates that the value UseGlobal has been coded on the Multipath parameter on the RouteTable statement; the value was obtained from the IPCONFIG statement.
Policy
Indicates that the multipath value was obtained from the Multipath parameter of the RouteTable statement.

Tip: If IPSECURITY is coded on the IPCONFIG statement and Multipath PerPacket is specified on a RouteTable statement, the Multipath PerPacket option is disabled. The value No(Policy) is displayed on the report. For more information, see the RouteTable statement information in the z/OS Communications Server: IP Configuration Reference.

IPv6
The information in this field is divided into two parts. The value before the parentheses indicates whether the multipath routing selection algorithm for outbound IPv6 traffic is enabled for this policy-based routing table. See the Multipath6 parameter on the RouteTable statement in the z/OS Communications Server: IP Configuration Reference for more information. The possible values for the MultiPath6 field are:
Pkt
Indicates that outbound IPv6 traffic uses the round-robin distribution method to use multipath routes for each outbound packet.
Conn
Indicates that outbound IPv6 traffic uses the round-robin distribution method to use multipath routes for each outbound connection request.
No
Indicates that outbound IPv6 traffic always uses the first active route in a multipath group.
N/A
This value is displayed when either the routing table is not configured for IPv6 routing or only IPv4 routing information is being displayed for the table.
The value inside the parentheses identifies where the multipath value was obtained. The possible values are:
Profile
Indicates that the value UseGlobal has been coded on the Multipath6 parameter on the RouteTable statement; the value was obtained from the IPCONFIG6 statement.
Policy
Indicates that the multipath value was obtained from the Multipath6 parameter of the RouteTable statement.
Tip: If IPSECURITY is coded on the IPCONFIG6 statement and Multipath6 PerPacket is specified on a RouteTable statement, the Multipath6 PerPacket option is disabled. The value No(Policy) is displayed on the report. For more information, see the RouteTable statement information in the z/OS Communications Server: IP Configuration Reference.
DynamicXCFRoutes
IPv4
Indicates whether direct routes to the IPv4 dynamic XCF addresses on other TCP/IP stacks are added to the policy-based routing table when the dynamic XCF links to those stacks are active. These are the same routes that are automatically generated in the main routing table when the IPv4 dynamic XCF links are active. See Dynamic XCF in the z/OS Communications Server: IP Configuration Guide for information about the dynamic XCF function and the definitions that are automatically generated when IPCONFIG DYNAMICXCF is specified in the TCP/IP profile. This field can have the following values:
Yes
Direct routes to the IPv4 dynamic XCF addresses on other TCP/IP stacks are added to the policy-based routing table when the dynamic XCF links to those stacks are active.
No
Direct routes to the IPv4 dynamic XCF addresses on other TCP/IP stacks are not added to the policy-based routing table when the dynamic XCF links to those stacks are active.
N/A
This value is displayed when either the routing table is not configured for IPv4 routing or only IPv6 routing information is being displayed for the table.
IPv6
Indicates whether direct routes to the IPv6 dynamic XCF addresses on other TCP/IP stacks are added to the policy-based routing table when the dynamic XCF links to those stacks are active. These are the same routes that are automatically generated in the main routing table when the IPv6 dynamic XCF links are active. See Dynamic XCF in the z/OS Communications Server: IP Configuration Guide for information about the dynamic XCF function and the definitions that are automatically generated when IPCONFIG6 DYNAMICXCF is specified in the TCP/IP profile. This field can have the following values:
Yes
Direct routes to the IPv6 dynamic XCF addresses on other TCP/IP stacks are added to the policy-based routing table when the dynamic XCF links to those stacks are active.
No
Direct routes to the IPv6 dynamic XCF addresses on other TCP/IP stacks are not added to the policy-based routing table when the dynamic XCF links to those stacks are active.
N/A
This value is displayed when either the routing table is not configured for IPv6 routing or only IPv4 routing information is being displayed for the table.
Interface
The name of the interface that is specified in a dynamic routing parameter for the policy-based routing table. If the interface is not currently defined to the TCP/IP stack for the same IP version as the dynamic routing parameter or the interface is inactive on the TCP/IP stack, the name is preceded by an asterisk (*).
NextHop
The next-hop router IP address that is specified in a dynamic routing parameter for the policy-based routing table. The value Any is displayed when no next-hop router IP address is specified for the dynamic routing parameter.