Monitoring MLPPP
Use the commands in this section to display information about MLPPP interfaces.
You can set a statistics baseline for MLPPP serial (member link) or bundle (multilink) interfaces using the baseline ppp command. Use the delta keyword with the show commands described below to display statistics with the baseline values subtracted.
After you configure multilink PPP, you can use the show ppp interface commands to display configuration and statistics information about MLPPP and MLPPP fragmentation and reassembly.
You can use the output filtering feature of the show command to include or exclude lines of output based on a text string you specify. For details, see show Commands in JunosE System Basics Configuration Guide.
![]() | Note: The E120 and E320 routers output for monitor and show commands is identical to output from other E Series routers, except that the E120 and E320 routers output also includes information about the adapter identifier in the interface specifier (slot/adapter/port). |
baseline ppp interface
- Use to set a statistics baseline for PPP interfaces—including MLPPP interfaces, either individual serial (member link) interfaces or multilink (bundle) interfaces.
- Use only the serial or mlppp keywords.
- For serial interfaces, specify the interface location in the format slot/port:channel/subchannel for CT3 modules.
- For MLPPP interfaces, specify the interface location as the name of the MLPPP bundle.
- The router implements the baseline by reading and storing the statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.
- When baselining is requested, the time since the last
baseline was set is displayed in hours:minutes:seconds or days/hours format. If a baseline was not
set, the following message is displayed instead:
No baseline has been set
- Use the optional delta keyword with MLPPP show commands to specify that baselined statistics are to be shown.
- Examplehost1#baseline ppp interface serial 2/0:1/1
- There is no no version.
- See baseline ppp interface.
Sample Display Without Baseline
The following command displays PPP interface (including MLPPP interface) statistics without baselining:
host1#show ppp interface statistics
PPP interface serial 2/0:4/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 572 684 errors 0 0 discards 0 0 PPP interface serial 2/0:5/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 572 684 errors 0 0 discards 0 0 PPP interface serial 2/1:4/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 572 684 errors 0 0 discards 0 0 PPP interface serial 2/1:5/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 572 684 errors 0 0 discards 0 0 4 ppp interfaces found
PPP interface mlppp group1 is up PPP multilink member-interface serial 2/0:1/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 608 716 errors 0 0 discards 0 0 PPP multilink member-interface serial 2/0:2/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 608 716 errors 0 0 discards 0 0 PPP multilink member-interface serial 2/0:3/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 596 704 errors 0 0 discards 0 0
PPP interface mlppp group2 is up PPP multilink member-interface serial 2/1:1/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 628 740 errors 0 0 discards 0 0 PPP multilink member-interface serial 2/1:2/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 628 740 errors 0 0 discards 0 0 PPP multilink member-interface serial 2/1:3/1 is up No baseline has been set Interface statistics in out packets 0 0 octets 616 728 errors 0 0 discards 0 0 2 mlppp interfaces found
Sample Display with Baseline
The following command displays PPP interface (including MLPPP interface) statistics with baselining:
host1#show ppp interface statistics delta
PPP interface serial 2/0:4/1 is up Time since last baseline 00:00:35 Interface statistics in out packets 0 0 octets 75 82 errors 0 0 discards 0 0 PPP interface serial 2/0:5/1 is up Time since last baseline 00:00:37 Interface statistics in out packets 0 0 octets 87 90 errors 0 0 discards 0 0 PPP interface serial 2/1:4/1 is up Time since last baseline 00:00:39 Interface statistics in out packets 0 0 octets 101 112 errors 0 0 discards 0 0 PPP interface serial 2/1:5/1 is up Time since last baseline 00:00:43 Interface statistics in out packets 0 0 octets 94 99 errors 0 0 discards 0 0 4 ppp interfaces found PPP interface mlppp group1 is up PPP multilink member-interface serial 2/0:1/1 is up Time since last baseline 00:00:17 Interface statistics in out packets 0 0 octets 28 26 errors 0 0 discards 0 0 PPP multilink member-interface serial 2/0:2/1 is up Time since last baseline 00:10:22
Interface statistics in out packets 0 0 octets 102 104 errors 0 0 discards 0 0 PPP multilink member-interface serial 2/0:3/1 is up Time since last baseline 00:00:19 Interface statistics in out packets 0 0 octets 112 126 errors 0 0 discards 0 0
PPP interface mlppp group2 is up PPP multilink member-interface serial 2/1:1/1 is up Time since last baseline 00:00:23 Interface statistics in out packets 0 0 octets 125 132 errors 0 0 discards 0 0 PPP multilink member-interface serial 2/1:2/1 is up Time since last baseline 00:00:25 Interface statistics in out packets 0 0 octets 135 138 errors 0 0 discards 0 0 PPP multilink member-interface serial 2/1:3/1 is up Time since last baseline 00:00:30 Interface statistics in out packets 0 0 octets 125 132 errors 0 0 discards 0 0 2 mlppp interfaces found
show ppp interface mlppp
- Use to display information about MLPPP interfaces.
- You can display a great variety of information with this complex command. See the show ppp interface command in Configuring Point-to-Point Protocol, for more detailed information about the display options.
- Use the show ppp interface command to display information about all PPP interfaces, including MLPPP interfaces.
- Field descriptions
- PPP interface mlppp—Name and administrative status (up or down) for an MLPPP bundle
- PPP multilink member-interface—Interface type, interface specifier, and administrative status (up or down) for an MLPPP member link
- Network interface administrative status—Indicates whether the interface for the MLPPP bundle is administratively enabled (open), meaning that the no ppp shutdown command is operational, or administratively disabled (closed), meaning that the ppp shutdown command is operational
- Link interface administrative status—Indicates whether the interface for the member link is administratively enabled (open), meaning that the no ppp shutdown command is operational, or administratively disabled (closed), meaning that the ppp shutdown command is operational
- Configured network protocol—Network protocol configured on the interface
- Fragmentation and reassembly configuration:
- Link interface fragmentation—Indicates whether MLPPP fragmentation is enabled or disabled on the link interface
- Link interface fragment size—MLPPP fragment size, in octets, currently in use on the link interface
- Link interface reassembly—Indicates whether MLPPP reassembly is enabled or disabled on the link interface
- Link interface administrative MRRU—Administrative MRRU value, in octets, currently in use on the link interface
- Baseline status—Indicates whether a statistics baseline has been set
- Interface statistics:
- packets—Number of packets received (in) and sent (out) on the interface
- octets—Number of octets received (in) and sent (out) on the interface
- errors—Number of errors received (in) and sent (out) on the interface
- discards—Number of packets discarded on receipt
(in) or discarded before they were transmitted (out)

Note: For the LCP, IPCP, and OSINLCP negotiated options, the command displays a value of “none” if the option was not negotiated.
- LCP protocol configuration:
- max-receive-unit—Controls negotiation of the local
MRU option; value can be one of the following:
- use lower layer—MRU of the layer below PPP defines the MRU to be negotiated
- disabled—MRU option is not to be negotiated
- a numeric value—MRU value to be negotiated
- authentication—Controls negotiation of the local
authentication option; value can be one of the following:
- none—Do not negotiate
- chap—Negotiate CHAP
- pap—Negotiate PAP
- chap/pap—Negotiate CHAP, and if it is rejected, negotiate PAP
- pap/chap—Negotiate PAP, and if it is rejected, negotiate CHAP
- magic-number—Controls whether the local magic number is negotiated: enabled (negotiate), or disabled (do not negotiate)
- magic-number-mismatch—Indicates whether the router is configured to ignore the LCP peer magic number and retain the PPP connection when the peer has not negotiated an LCP magic number: ignore (ignore the peer magic number mismatch and retain the PPP connection), or reject (router terminates the PPP connection if it detects a peer magic number mismatch)
- keepalive-timer—Rate of LCP echo requests, in seconds
- restart-timer—Retry frequency during LCP, IPCP, and OSINLCP negotiations, in seconds
- max-terminate—Maximum number of terminate requests
- max-configure—Maximum number of configure requests
- max-failure—Maximum number of configure NAKs
- max-receive-unit—Controls negotiation of the local
MRU option; value can be one of the following:
- LCP protocol status:
- link-status—Indicates the overall status of LCP negotiations, including the following states: initial (idle), starting (ready to negotiate), authenticate (authenticating), and network (LCP is up)
- LCP negotiated options:
- max-receive-unit—Negotiated maximum receive unit, in octets, for the local and remote (peer) side of the link
- max-receive-reconstructed-unit—Negotiated maximum receive reconstructed unit, in octets, for the local and remote (peer) side of the link
- authentication—Negotiated authentication method (none, pap, or chap) for the local and remote (peer) side of the link
- magic-number—Negotiated magic number for the local and remote (peer) side of the link
- pfc—Negotiated pfc (none or enabled) for the local and remote (peer) side of the link
- acfc—Negotiated acfc (none or enabled) for the local
and remote (peer) side of the link

Note: The command displays a value of “none” for any negotiated option parameters if the option was not negotiated.
- LCP Endpoint Discriminator options:
- local discriminator class—Endpoint discriminator type, format, and address space for the local system
- local endpoint discriminator—Endpoint discriminator value for the local system within the specified class
- peer discriminator class—Endpoint discriminator type, format, and address space for the remote system
- peer endpoint discriminator—Endpoint discriminator value for the remote system within the specified class
- LCP protocol statistics:
- in-keepalive-requests—Number of received keepalive requests (LCP Echo Request) for the life of the interface (since either system boot or interface creation, whichever is later)
- out-keepalive-requests—Number of transmitted keepalive requests for the life of interface
- in-keepalive-replies—Number of received keepalive replies for the life of the interface
- out-keepalive-replies—Number of transmitted keepalive replies for the life of the interface
- keepalive-failures—Number of keepalive failures reported on the interface
- max-renegotiation-terminates—Number of renegotiation terminations for the PPP session
- IPCP protocol configuration:
- configured—IPCP is configured on this interface (true or false)
- administrative-status—IPCP administrative status (open or closed)
- ip-address—Address to be used for negotiation of local IP address option
- dns-precedence—Used to resolve conflicts during DNS address negotiation
- local—Local side takes precedence, and the no ppp peer dns command is operative
- peer—Remote side takes precedence, and the ppp peer dns command is operative
- wins-precedence—Used to resolve conflicts during WINS address negotiation
- ipcp-lockout—Terminates an invalid subscriber entry and prevents additional IPCP negotiations (enabled or disabled)
- max-negotiations—Maximum number of renegotiation attempts that the router accepts before terminating a PPP session
- IPCP protocol status:
- operational-status—IPCP operational status (up, down, not present, or not present no resources)
- IPCP negotiated options:
- ip-address—Negotiated IP address for the local and remote (peer) side of the link
- primary-dns-address—Negotiated primary DNS address for the local and remote (peer) side of the link
- secondary-dns-address—Negotiated secondary DNS address for the local and remote (peer) side of the link
- primary-wins-address—Negotiated primary WINS address for the local and remote (peer) side of the link
- secondary-wins-address—Negotiated secondary WINS
address for the local and remote (peer) side of the link

Note: The command displays a value of “none” for any negotiated option parameters if the option was not negotiated.
- OSINLCP protocol configuration:
- configured—OSINLCP is configured on this interface (true or false)
- administrative-status—OSINLCP administrative status (open or closed)
- OSINLCP protocol status:
- operational-status—OSINLCP operational status (up, down, not present, or not present no resources)
- terminate-reason—Reason for termination of OSINLCP service
- OSINLCP negotiated options
- npdu-alignment—Negotiated NPDU alignment for the local and remote (peer) side of the link
- Example 1—Displays information about the MLPPP member
links configured in bundle group1
host1#show ppp interface mlppp group1 members PPP interface mlppp group1 is up PPP multilink member-interface serial 2/0:1/1 is up PPP multilink member-interface serial 2/0:2/1 is up PPP multilink member-interface serial 2/0:3/1 is up
- Example 2—Displays information about all MLPPP member
links configured for all bundles
host1#show ppp interface mlppp members PPP interface mlppp group1 is up PPP multilink member-interface serial 2/0:1/1 is up PPP multilink member-interface serial 2/0:2/1 is up PPP multilink member-interface serial 2/0:3/1 is up PPP interface mlppp group2 is up PPP multilink member-interface serial 2/1:1/1 is up PPP multilink member-interface serial 2/1:2/1 is up PPP multilink member-interface serial 2/1:3/1 is up PPP interface mlppp group3 No member-interfaces found
- Example 3—Displays information about all MLPPP encapsulated
links, regardless of whether the links are members of an MLPPP bundle
host1#show ppp interface mlppp links PPP multilink interface serial 2/0:1/1 is up PPP multilink interface serial 2/0:2/1 is up PPP multilink interface serial 2/0:3/1 is up PPP multilink interface serial 2/1:1/1 is up PPP multilink interface serial 2/1:2/1 is up PPP multilink interface serial 2/1:3/1 is up
- Example 4—Displays configuration information about
MLPPP member links configured in bundle group1
host1#show ppp interface mlppp group1 config PPP interface mlppp group1 is up Network interface administrative status is open Configured network protocol is IPCP PPP multilink member-interface ATM 10/0.10 is up Link interface administrative status is open Link interface fragmentation is enabled Link interface fragment size is 128 Link interface reassembly is enabled Link interface administrative MRRU is 2000 PPP multilink member-interface ATM 10/0.11 is down (lower layer down) Link interface administrative status is closed Link interface fragmentation is enabled Link interface fragment size is 128 Link interface reassembly is enabled Link interface administrative MRRU is 2000 PPP multilink member-interface ATM 10/0.12 is down (lower layer down) Link interface administrative status is closed Link interface fragmentation is enabled Link interface fragment size is 128 Link interface reassembly is enabled Link interface administrative MRRU is 2000 PPP multilink member-interface ATM 10/0.13 is down (lower layer down) Link interface administrative status is closed Link interface fragmentation is enabled Link interface fragment size is 128 Link interface reassembly is enabled Link interface administrative MRRU is 2000 1 mlppp interfaces found
- Example 5—Displays statistics about all configured
MLPPP member links configured in bundle group1
host1#show ppp interface mlppp group1 statistics PPP interface mlppp group1 is up PPP multilink member-interface ATM 10/0.10 is up No baseline has been set Interface statistics in out packets 0 0 octets 170 690 errors 0 0 discards 0 0 PPP multilink member-interface ATM 10/0.11 is down (lower layer down) No baseline has been set Interface statistics in out packets 0 0 octets 50 0 errors 0 0 discards 0 0 PPP multilink member-interface ATM 10/0.12 is down (lower layer down) No baseline has been set Interface statistics in out packets 0 0 octets 50 0 errors 0 0 discards 0 0 PPP multilink member-interface ATM 10/0.13 is down (lower layer down) No baseline has been set Interface statistics in out packets 0 0 octets 50 0 errors 0 0 discards 0 0 1 mlppp interfaces found
- Example 6—Displays status information about the
specified MLPPP bundle
host1#show ppp interface mlppp group1 status PPP interface mlppp group1 is up 1 mlppp interfaces found
- Example 7—Shows complete configuration, statistics,
and status information about the specified MLPPP bundle
host1#show ppp interface mlppp group1 full PPP interface mlppp group1 is up Network interface administrative status is open Configured network protocol is IPCP IPCP protocol configuration configured true administrative-status open ip-address 1.2.3.4 dns-precedence local wins-precedence local max-negotiations 10 IPCP protocol status operational-status up IPCP negotiated options local peer ip-address 1.2.3.4 6.7.8.9 primary-dns-address none none secondary-dns-address none none primary-wins-address none none secondary-wins-address none none OSINLCP protocol configuration configured false administrative-status open OSINLCP protocol status operational-status not present terminate-reason not configured PPP multilink member-interface serial 2/0:1/1 is up Link interface administrative status is open No baseline has been set Interface statistics in out packets 0 0 octets 1488 1972 errors 0 0 discards 0 0 LCP protocol configuration max-receive-unit use lower layer authentication none magic-number enabled magic-number-mismatch ignore keepalive-timer 30 seconds restart-timer 3 seconds max-terminate 2 max-configure 10 max-failure 5 LCP protocol status link-status network
LCP negotiated options local peer max-receive-unit 1590 1590 max-receive-reconstructed-unit 1590 1590 authentication none none magic-number 0x6c079eb0 0x2c5a5798 pfc none none acfc none none LCP Endpoint Discriminator options local discriminator class Locally Assigned Address local endpoint discriminator 0x31393933313030303800001b000001 peer discriminator class Locally Assigned Address peer endpoint discriminator 0x31393933313030303800001b000002 LCP protocol statistics in-keepalive-requests 70 out-keepalive-requests 70 in-keepalive-replies 70 out-keepalive-replies 70 keepalive-failures 0 max-renegotiation-terminates 10 PPP multilink member-interface serial 2/0:2/1 is up Link interface administrative status is open No baseline has been set Interface statistics in out packets 0 0 octets 1508 1996 errors 0 0 discards 0 0 LCP protocol configuration max-receive-unit use lower layer authentication none magic-number enabled magic-number-mismatch ignore keepalive-timer 30 seconds restart-timer 3 seconds max-terminate 2 max-configure 10 max-failure 5 LCP protocol status link-status network LCP negotiated options local peer max-receive-unit 1590 1590 max-receive-reconstructed-unit 1590 1590 authentication none none magic-number 0x7ada4a05 0x1bb178cd pfc none none acfc none none
LCP Endpoint Discriminator options local discriminator class Locally Assigned Address local endpoint discriminator 0x31393933313030303800001b000001 peer discriminator class Locally Assigned Address peer endpoint discriminator 0x31393933313030303800001b000002 LCP protocol statistics in-keepalive-requests 71 out-keepalive-requests 71 in-keepalive-replies 71 out-keepalive-replies 71 keepalive-failures 0 PPP multilink member-interface serial 2/0:3/1 is up Link interface administrative status is open No baseline has been set Interface statistics in out packets 0 0 octets 1568 2068 errors 0 0 discards 0 0 LCP protocol configuration max-receive-unit use lower layer authentication none magic-number enabled magic-number-mismatch ignore keepalive-timer 30 seconds restart-timer 3 seconds max-terminate 2 max-configure 10 max-failure 5 LCP protocol status link-status network LCP negotiated options local peer max-receive-unit 1590 1590 max-receive-reconstructed-unit 1590 1590 authentication none none magic-number 0x31cc52e0 0x32ebdec6 pfc none none acfc none none LCP Endpoint Discriminator options local discriminator class Locally Assigned Address local endpoint discriminator 0x31393933313030303800001b000001 peer discriminator class Locally Assigned Address peer endpoint discriminator 0x31393933313030303800001b000002 LCP protocol statistics in-keepalive-requests 74 out-keepalive-requests 74 in-keepalive-replies 74 out-keepalive-replies 74 keepalive-failures 0 1 mlppp interfaces found
- Example 8—Displays information about the MLPPP interface
host1#show ppp interface mlppp 0/0-1 full PPP interface mlppp 0/0-1 is up Network interface administrative status is open Configured network protocols are IPCP, IPV6CP IPCP protocol configuration configured true administrative-status open ip-address 192.168.1.1 dns-precedence local wins-precedence local ipcp-netmask-option disabled ipcp-lockout enabled IPCP protocol status operational-status up IPCP negotiated options local peer ip-address 192.168.1.1 100.100.100.17 ip-address-mask none none primary-dns-address none none secondary-dns-address none none primary-wins-address none none secondary-wins-address none none IPV6CP protocol configuration configured true ... PPP multilink member-interface ATM 0/0.10 is up Link interface administrative status is open Link interface fragmentation is enabled Link interface fragment size is (use MTU) Link interface reassembly is enabled Link interface administrative MRRU is (use MRU) Link interface hash-link-selection is disabled No baseline has been set ... Authentication status grant true session-timeout 31622400 seconds inactivity-timeout none monitor-ingress-only false accounting-timeout none peer-ip-address 100.100.100.17 peer-ip-address-mask none peer-primary-dns-address none peer-secondary-dns-address none peer-primary-wins-address none peer-secondary-wins-address none peer-ipv6-interface-id none
- See show ppp interface.
show ppp interface summary
- Use to display a summary of all the multilinked and nonmultilinked PPP interfaces configured on the router.
- Field descriptions
- PPP Status—Non-multilinked PPP interfaces
- Configuration status—Indicates the configuration
state of the PPP interface, IPCP, IPv6CP ,
OSINLCP, or MPLS
- configured—Interface or protocol is configured
- notConfigured—Interface or protocol is not configured
- Administrative status—Indicates the administrative
state of the PPP interface, IPCP, IPv6CP ,
OSINLCP, or MPLS
- open—Interface or protocol is administratively enabled
- closed—Interface or protocol is administratively disabled
- Operational status (Interface)—Indicates the operational
state of the PPP interface
- up—Interface is operational
- down—Interface is not operational because of a problem in the PPP layer
- lowerDown—Interface is not operational because a lower layer in the protocol stack is down
- notPresent—Interface is not operational because the hardware is unavailable
- passive—Interface is waiting for the peer to send an LCP confReq message
- tunnel—Interface is being redirected through a tunnel
- Operational status (Ip, Ipv6, Osi, Mpls)—Indicates
the operational state of the IPCP, IPv6CP, OSINLCP, or MPLS protocol
- up—Protocol is operational
- down—Protocol is not operational because of a problem in the PPP layer
- notPresent—Protocol is not operational because it does not exist
- noResources—Protocol is not operational because it does not exist due to a lack of resources
- PPP Multilink Status—Multilinked PPP interfaces
- Example
host1#show ppp interface summary PPP Status Configuration status configured notConfigured Interface 4000 n/a Ip 4000 0 Ipv6 0 4000 Osi 0 4000 Mpls 0 4000 Administrative status open closed Interface 4000 0 Ip 4000 0 Ipv6 4000 0 Osi 4000 0 Mpls 4000 0 Operational status up down notPresent noResources Interface 4000 0 0 n/a Ip 4000 0 0 0 Ipv6 0 0 4000 0 Osi 0 0 4000 0 Mpls 0 0 4000 0 Operational status lowerDown passive tunnel Interface 0 0 0
PPP Multilink Status Configuration status configured notConfigured Link Interface 8000 n/a Network Interface 2000 n/a Ip 2000 0 Ipv6 0 2000 Osi 0 2000 Mpls 0 2000 Administrative status open closed Link Interface 8000 0 Network Interface 2000 0 Ip 2000 0 Ipv6 2000 0 Osi 2000 0 Mpls 2000 0 Operational status up down notPresent noResources Link Interface 8000 0 0 n/a Network Interface 2000 0 0 n/a Ip 2000 0 0 0 Ipv6 0 0 2000 0 Osi 0 0 2000 0 Mpls 0 0 2000 0 Operational status lowerDown passive tunnel Link Interface 0 0 0 Network Interface 0 0 0
- See show ppp interface summary.
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