Help for MVS Stack Interface - Gateway Detail

This help page explains the display of detailed information about a selected gateway from the ipForwardingTable (RFC1354) and the ibmMvsGatewayTable extension.

Destination

The destination of the selected link from the previous page.

Next Hop

The next hop defined for the selected link from the previous screen.

Protocol

The protocol defined for the selected link from the previous screen.

Policy

The general set of conditions that would cause the selection of one multipath route (set of next hops for a given destination) is referred to as 'policy'. See RFC1354 for complete details.

Type

The type of route. Note that local(3) refers to a route for which the next hop is the final destination; remote(4) refers to a route for which the next hop is not the final destination. Type can be one of the following values:

Mask

Indicates the mask to be logical-ANDed with the destination address before being compared to the value in the ipForwardDest field. For those systems that do not support arbitrary subnet masks, an agent constructs the value of the ipForwardMask by reference to the IP Address Class.

Age

The number of seconds since this route was last updated or otherwise determined to be correct. Note that no semantics of `too old' can be implied except through knowledge of the routing protocol by which the route was learned.

Specific Info

A reference to MIB definitions specific to the particular routing protocol which is responsible for this route, as determined by the value specified in the route's ipForwardProto value. If this information is not present, its value should be set to the OBJECT IDENTIFIER { 0 0 }, which is a syntactically valid object identifier, and any implementation conforming to ASN.1 and the Basic Encoding Rules must be able to generate and recognize this value.

Delay Acks

Delays transmission of acknowledgements when a packet is received with the PUSH bit set in the TCP header. The DELAYACKS parameter on the GATEWAY statement only applies to the TCP protocol and only affects acknowledgements returned to the foreign host. To delay acknowledgements on a TCP/IP port connection, use the DELAYACKS parameter on the PORT statement.

Next Hop ASN

The autonomous system number of the next hop. When this is unknown or not relevant to the protocol, it is indicated by ipForwardProto, zero.

Round Trip Gain

Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of 100th of a second.

Variance Gain

Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of 100th of a second.

Variance Multiplier

Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of 100th of a second.

Max Retransmit Time

Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of 100th of a second.

Min Retransmit Time

Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of 100th of a second.

Metrics 1

The primary routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipForwardProto value. If this metric is not used, its value should be set to None(-1).

Metrics 2

The primary routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipForwardProto value. If this metric is not used, its value should be set to None(-1).

Metrics 3

The primary routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipForwardProto value. If this metric is not used, its value should be set to None(-1).

Metrics 4

The primary routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipForwardProto value. If this metric is not used, its value should be set to None(-1).

Metrics 5

Alternate routing metricies for this route. The semantics of these metricies are determined by the routing-protocol specified in the route's ipForwardProto value. If this metric is not used, its value should be set to None(-1).