show system buffers

Syntax

show system buffers

Description

Display information about the buffer pool that the Routing Engine uses for local traffic, which 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, pings, and so on).

Required Privilege Level

view

Output Fields

mbufs in use—Memory buffers (mbufs) are 128-byte buffers that are used for various purposes inside the kernel. A special type of mbuf 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. Each mbuf has a type, and the following lines itemize the amount allocated for each type. Types with no mbufs allocated are not displayed.

mbufs allocated to packet headers—Number of mbufs currently holding packet headers.

mbufs allocated to protocol control blocks—Number of mbufs currently holding state for sockets.

mbufs allocated to socket send data—Number of mbufs currently holding socket send data.

mbufs allocated to pfe refill data—Number of mbufs currently holding PFE refill data.

mbufs allocated to fxp data—Number of mbufs currently holding fxp data.

mbufs allocated to socket names and addresses—Number of mbufs 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 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 protocol drain routines—Number of times a memory allocation request within the IPC and networking code triggered a memory reclamation attempt.

Sample Output

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