show system buffers

Display information about the buffer pool that the Routing Engine uses for local traffic. Local traffic is the routing and management traffic that is exchanged between the Routing Engine and the Packet Forwarding Engine within the router, as well as the routing and management traffic from IP (that is, from OSPF, BGP, SNMP, ping operations, and so on).

Options

all-lcc — (Routing matrix only) (Optional) Show buffer statistics for all T640 routing nodes (or line-card chassis) connected to a TX Matrix platform.

lcc number — (Routing matrix only) (Optional) Show buffer statistics for a specific T640 routing node (or line-card chassis) that is connected to a TX Matrix platform. Replace number with a value from 0 through 3.

scc — (Routing matrix only) (Optional) Show buffer statistics for the TX Matrix platform (or switch-card chassis).

Additional Information

By default, when you issue the show system buffers command on a TX Matrix master Routing Engine, the command is broadcast to all the T640 master Routing Engines connected to it. Likewise, if you issue the same command on the TX Matrix backup Routing Engine, the command is broadcast to all the T640 backup Routing Engines that are connected to it.

A special type of memory buffer called a cluster is 2 KB in size. For more information, see The Design and Implementation of the 4.4BSD Operation System by McKusic, Bostic, Karels, and Quarterman.

Required Privilege Level

List of Sample Output

Output Fields

Table 118 describes the output fields for the show system buffers command. Output fields are listed in the approximate order in which they appear.

Field Name	Field Description
mbufs in use	Memory buffers (mbufs) are 128-byte buffers that are used for various purposes inside the kernel. Each memory buffer has a type, and the output itemizes the amount allocated for each type. Types with no memory buffers allocated are not displayed.
mbufs allocated to packet headers	Number of memory buffers currently holding packet headers
mbufs allocated to control blocks	Number of memory buffers currently holding state for sockets.
mbufs allocated to send data	Number of memory buffers currently holding socket send data.
mbufs allocated to pfe refill data	Number of memory buffers currently holding Packet Forwarding Engine refill data.
mbufs allocated to fxp data	Number of memory buffers currently holding fxp data.
mbufs allocated to socket names and addresses	Number of memory buffers currently holding addresses for sockets.
mbuf clusters in use	Allocation statistics for mbuf clusters.
allocated to network	Total amount of memory in use by the networking and interprocess communication (IPC) code.
requests for memory denied	Number of times a memory allocation request within the IPC and networking code failed.
requests for memory delayed	Number of times a memory allocation request within the IPC and networking code was postponed.
calls to protoocl drain routines	Number of times a memory allocation request within the IPC and networking code triggered a memory reclamation attempt.

user@host> show system buffers

        853 mbufs in use:
        2 mbufs allocated to packet headers
        37 mbufs allocated to protocol control blocks
        28 mbufs allocated to socket names and addresses
        2 mbufs allocated to socket send data
        400 mbufs allocated to pfe refill data
        384 mbufs allocated to fxp data
784/944 mbuf clusters in use
1994 Kbytes allocated to network (83% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines

show system buffers scc (Routing Matrix)

user@host> show system buffers scc

213 mbufs in use:
        11 mbufs allocated to packet headers
        26 mbufs allocated to socket names and addresses
        2 mbufs allocated to socket options
        17 mbufs allocated to socket send data
        2 mbufs allocated to pfe data
        155 mbufs allocated to fxp data (rx)
        511 mbufs allocated to <mbuf type 86>
        256 mbufs allocated to <mbuf type 92>
924/1162 mbuf clusters in use
2788 Kbytes allocated to network (75% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines

show system buffers

Syntax

Syntax (Routing Matrix)

Release Information

Description

Options

Additional Information

Required Privilege Level

List of Sample Output

Output Fields

show system buffers

show system buffers scc (Routing Matrix)