Juniper BXOS 4.1 R2 - S 07-2010 Instruction Manual

Release 4.1 R2 Features 1

BXOS 4.1 R2 Software Release Notes

Release 4.1 R2

July 2010 These release notes accompany Release 4.1R2 of the BXOS software. They briefly

describe the hardware and software features, and identify the outstanding issues.

The BXOS software runs on the BX7000 Multi-Access Gateway.

Release 4.1 R2 Features

The following are a list of features for the BX7000 Multi-Access Gateway and the

BXOS Release 4.1R2. Following the description is the title of the manual to consult

for further information. For a complete list of manuals, see Table 3 on page 23.

Hardware The gateway houses a Clock Card Expansion Bay that accommodates the

advanced clocking module.

The advanced clocking module contains the following connectors for external

clock sources:

2 BNC connectors

1 RJ-45 connector

For more information about the advanced clocking module, see the BX7000

Multi-Access Gateway Hardware Guide.

Interfaces Support for IEEE 802.1ah OAM functionality on all Ethernet

interfaces—Ethernet interfaces support the IEEE 802.1ah standard for

Operation, Administration, and Management (OAM). The BXOS software

supports IEEE 802.3ah discovery and monitoring, remote fault detection, and

remote loopback. To enable IEEE 802.1ah support on the Ethernet interface,

include the interface statement at the [edit protocols oam-ethernet

link-fault-management] hierarchy level.

Support for IEEE 802.1ag OAM functionality on all Ethernet

interfaces—Ethernet interfaces support the IEEE 802.1ag standard for OAM.

The IEEE 802.1ag specification provides Ethernet connectivity-fault

management (CFM), which is the standard for Layer 2 ping, Layer 2 traceroute,

and the end-to-end connectivity check of the Ethernet network. To enable IEEE

802.1ag support on the Ethernet interface, include the interface statement at

the [edit protocols oam-ethernet connectivity-fault-management] hierarchy level.

BXOS 4.1 R2 Software Release Notes

2Release 4.1 R2 Features

Forwarding Static or dynamic Ethernet pseudowire—Dynamic Ethernet pseudowire over

an MPLS or GRE tunnel is supported. Static Ethernet pseudowire over a static

MPLS tunnel is supported. An Ethernet pseudowire positioned between two

provider edges (PEs) carries the Ethernet frames or 802.3 protocol data units

(PDUs) from one PE to another over an MPLS network. The Ethernet

pseudowire operates in one of the three modes: raw mode, tagged mode, or

tagged-default mode.

If an Ethernet pseudowire is operating in a raw mode, the

service-delimiting tags are never sent over the pseudowire. If a

service-delimiting tag is present when the frame is received from the

attachment circuit by the provider edge (PE), it is stripped (by the NSP)

from the frame before the frame is sent to the pseudowire.

If an Ethernet pseudowire is operating in tagged mode, every frame sent

over the pseudowire must have a service-delimiting VLAN tag. If the frame

as received by the PE from the attachment circuit does not have a

service-delimiting VLAN tag, the PE must prepend the frame with a

dummy VLAN tag before sending the frame on the pseudowire. This is the

default operating mode.

For more information about the Ethernet pseudowire, see the BXOS Configuration

Guide.

Increase in MTU size for Ethernet port interface (Routing mode)—The MTU is

configured for this interface by the user. In BXOS Release 4.1, the MTU value is

now limited to a maximum of 1900 bytes.

Increase in MTU size for Ethernet port interface (Attachment Circuit (AC)

mode)— In BXOS Release 4.1, the user can configure the MTU value for this AC

port and the AC port will not receive or transmit more than the configured MTU

value. This MTU value is now limited to a maximum of 1800 bytes per Ethernet

frame.

Increase in MTU size for Ethernet pseudowire—In BXOS Release 4.1, the MTU

value is increased to a maximum of 1800 bytes.

Increase in number of concatenation of cells for ATM pseudowire— In BXOS

Release 4.1, the number of concatenation cells is increased from 28 to 34 cells

to utilize the available increased payload size with an increase in the

network-facing Ethernet interface MTU.

Increase in MTU size for GRE tunnel interfaces— In BXOS Release 4.1, the

maximum MTU value is increased from 1500 bytes and is limited to 1900

bytes.

For more information about the change in MTU size, see the BXOS Configuration

Guide.

Timing and

Synchronization

The BX7000 Multi-Access Gateway contains an advanced clocking module with

an internal oscillator that generates the clock signals that the BXOS software

uses. This clock provides Stratum 3 level accuracy and synchronizes the

time-division multiplexing (TDM) and Ethernet interfaces with various available

reference clocks.

Release 4.1 R2 Features 3

BXOS 4.1 R2 Software Release Notes

The gateway supports the following internal input reference clock sources:

T1 or E1 line clocks

10 MHz

BITS

CES recovered clock

The gateway supports the following internal output reference clock sources:

T1 or E1 line clocks

Clock of 25 MHz for Ethernet interface

Routing and Signaling BFD for static routes—The BFD for static routes is used to detect next-hop

failure in sub-seconds with less overhead. BFD can be used to alert any control

plane protocols about the failure. To enable BFD for static routes, use the

bfd-liveness-detection statement at the [edit static-route destination-prefix]

hierarchy level.

For more information about BFD for static routes, see the BXOS Configuration

Guide.

VRRP implementation—VRRP implementation in BXOS provides the virtual

router function. All protocol messaging is performed using IP multicast

datagrams. A virtual router MAC address is used as the source of all periodic

VRRP messages sent by the master router to enable bridge learning in an

extended LAN.

A virtual router is defined by its virtual router identifier (VRID) and a set of

IP addresses. A VRRP router associates a virtual router with its real

addresses on an interface, and may also be configured with additional

virtual router mappings and priority for virtual routers it can backup. The

mapping between VRID and addresses must be coordinated among all

VRRP routers on a LAN.

Only the master for each virtual router sends periodic VRRP advertisement

messages. A backup router does not attempt to preempt the master unless

it has higher priority. VRRP router always becomes master of the any

virtual router associated with the addresses it owns. If the master is

unavailable, then the highest priority backup router transitions to master

after a short delay.

In BXOS 4.1R2 interface tracking feature is supported. Interface tracking in

VRRP group supports GIGE, VLAN, ML-PPP, PPP interface types and each

VRRP group can track a maximum of five interfaces. Bandwidth threshold

for interface tracking is not supported.

For more information about VRRP configuration including interface tracking

feature, see the BXOS Configuration Guide.

BXOS 4.1 R2 Software Release Notes

4Outstanding Issues

Network and Device

Management

Command-line interface—The BXOS command-line interface (CLI) is a

text-based interface that provides various commands for configuring and

monitoring the gateway. The CLI can be accessed through a console or network

connection using a secure shell (SSH) client. The CLI supports two modes of

operation: CLI operational mode and CLI configuration mode.

SNMP support—The gateway supports SNMPv1, SNMPv2, and SNMPv3. SNMP

is supported for data integrity, confidentiality, and authentication. The gateway

accepts requests in any of the three SNMP formats.

NETCONF—The gateway provides a NETCONF interface to enable retrieval and

manipulation of configuration data. It uses an Extensible Markup Language

(XML)-based data encoding for the configuration data and protocol messages.

NETCONF uses the XML interface for device manageability. NETCONF uses

SSH as the transport layer protocol and RADIUS or TACACS+ for

authenticating the SSH session. A maximum of four NETCONF sessions are

supported by the gateway.

Zero touch configuration—The gateway downloads its configuration files from

a remote server and configures itself according to the configuration commands

in the configuration file. A USB disk drive can be used instead of a

configuration server to configure the gateway. If the zero touch bit is enabled

and a USB disk has the configuration file (config.xml), the gateway uses this file

and does not make a Dynamic Host Configuration Protocol (DHCP) request.

Notification through SNMP traps—The gateway sends events such as interface

up/down state, pseudowire up/down state, software upgrade status, and so on,

as SNMP traps to the configured trap destinations. The gateway supports both

SNMPv1 and SNMPv2 traps. The maximum number of trap destinations is

four.

Bootloader and OS image upgrade—The gateway supports upgrade of BXOS

and bxboot software through the CLI and the NETCONF interfaces. The

gateway supports FTP, TFTP, HTTP, or HTTPS protocols for downloading the

software image.

For more information about network and device management, see the BXOS

Configuration Guide.

Outstanding Issues

Unable to set the ARP timeout. The BX does not support ARP aging. There is no

workaround. [PR/273628]

The VLAN subinterfaces in the gateway do not support the per-VLAN interface

statistics. The traffic forwarded through the VLAN interfaces is not displayed as

a part of statistics. There is no workaround. [PR/275851] [PR/303313]

The gateway does not support moving a standalone PPP link into a multilink

PPP bundle. As a workaround, delete the standalone PPP link and reconfigure it

as a member link in the bundle. [PR/275939]

Outstanding Issues 5

BXOS 4.1 R2 Software Release Notes

The gateway does not support moving a member link from one MLPPP bundle

to another bundle. As a workaround, delete the member link from the source

bundle and reconfigure the link as a new member link in the target bundle.

[PR/275941]

You cannot remove the primary link you created on the gateway when there

are other links present in the bundle. As a workaround, remove all other links

created in the bundle before removing the primary link. [PR/275942]

The gateway does not support configuring cell delay variance tolerance (CDVT)

for ATM VCs. There is no workaround. [PR/278451]

BXOS does not permit Address Resolution Protocol (ARP) entries to age out,

but keeps them alive. Prior to aging out, the host operating system sends out

proactive ARP requests and keeps the entries alive. There is no workaround.

[PR/279807]

The gateway does not have a provision to clear alarms generated by the power

supply unit (PSU). As a workaround, use the delete alarms power command at

the [edit chassis] hierarchy level to clear the PSU related alarm. [PR/280393]

The BXOS software does not support OSPF virtual links on the gateway. There

is no workaround. [PR/281198]

The gateway does not support tagged and untagged operations on a single

Ethernet interface simultaneously. To configure an Ethernet interface to use

tagged mode, you must create at least one subinterface before you associate

the Ethernet interface with an IP address. If you associate an Ethernet interface

with an IP address before you create a subinterface, the Ethernet interface

functions in untagged mode and you cannot create subinterfaces. As a

workaround, delete the IP address associated with the Ethernet interface and

create VLAN subinterfaces. This interface works only in tagged mode after this

operation. [PR/282223] [PR/282225]

The BXOS software does not support IP fragmentation over PPP or MLPPP

interfaces. As a workaround, specify higher maximum transmit unit (MTU) size

of packets on the PPP interface so that the packets are not fragmented.

[PR/282469]

The gateway does not support the octet-aligned T1 mode. There is no

workaround. [PR/283641]

The gateway always sends IS-IS hellos packets padded to the MTU size. The

BXOS software does not support disabling IS-IS hello padding. As a

workaround, configure similar MTU sizes between IS-IS peers. [PR/285794]

In BXOS, you cannot configure the IS-IS protocol as a level 1 or level 2 router.

By default, the IS-IS protocol is configured as both the level 1 and level 2 router.

As a workaround, disable level 2 in all IS-IS-enabled interfaces to configure the

gateway as the level 1 router or disable level 1 in all IS-IS-enabled interfaces to

configure the gateway as the level 2 router. [PR/285796]

BXOS 4.1 R2 Software Release Notes

6Outstanding Issues

The static MPLS tunnels assume that the next-hop through which the tunnel

destination is reached already has an ARP entry present in the ARP cache. If

you configure a static MPLS tunnel to a destination for which there is no

information in the ARP cache, the tunnel creation fails. As a workaround, use

static ARP entries for tunnel destinations before creating static tunnels.

[PR/286342]

The gateway does not support jumbo frames. The maximum Ethernet MTU

support is 1500 bytes. There is no workaround. [PR/287113]

The file delete * command deletes all files in the current working directory.

There is no workaround. [PR/287165]

The BXOS CLI does not support a specific command to display the number of

PPP interfaces. As a workaround, use the show interface command to display

the summary of all configured interfaces on the gateway. [PR/287229]

The gateway does not support configuring interface alarms for a specific

interface. As a workaround, use the set alarm command at the [edit chassis]

hierarchy level to configure alarms on T1, E1, or Ethernet interfaces.

[PR/287554]

The VLAN priority bits can be marked only based on the VLAN subinterface

configuration. The gateway does not support the VLAN priority bits marking

based on the multifield (MF) or behavior aggregate (BA) classification. There is

no workaround. [PR/287562]

The gateway does not support zero touch configuration from the JUNOScope

application. As a workaround, use CLI to configure the zero touch mode.

[PR/287964]

The IP addresses for PPP interfaces are not dynamically negotiated with the

peer. As a workaround, configure IP addresses for PPP interfaces. [PR/287982]

When you reboot the gateway after configuring and saving 200 pseudowires,

the gateway takes approximately 45 minutes to restore the configurations.

There is no workaround. [PR/289197]

After configuring the LDP protocol, if you issue the show ldp overview

command, it does not display LDP configuration details. As a workaround, use

the show protocol ldp command which displays LDP configuration details.

[PR/293862]

The show route command takes approximately 5 seconds to display the output

if more than 100 routes are configured on the gateway. There is no

workaround. [PR/297833]

In BXOS, path configuration is inside the LSPs. Therefore, you cannot use a

single path configuration for multiple LSPs. As a workaround, configure a path

for each LSP. [PR/301511]

The global BFD protocol configuration that is optional is used for modifying the

default BFD parameters. Once you have configured the global BFD, you cannot

delete that configuration. As a workaround, set the global BFD parameters to

their default values. [PR/302179]

Outstanding Issues 7

BXOS 4.1 R2 Software Release Notes

Pseudowire does not go down when the corresponding physical interface goes

down. There is no workaround. [PR/302247]

In BXOS, VLAN subinterfaces do not support per-VLAN interface statistics. Any

traffic that is forwarded through VLAN interfaces is not displayed as part of the

statistics. As a workaround, use the show interface command to display output

of traffic from a host. [PR/303313]

When you create two RSVP LSPs, configure setup and hold priorities, and set

bandwidth ranges to these LSPs, the LSP with high setup and hold priority does

not preempt the other LSP. The available bandwidth value for each LSP is

reduced and advertised through routing protocols. When the bandwidth is

exhausted, new LSPs are not created. There is no workaround. [PR/305677]

When traffic with packet size of 1500 bytes is sent at a speed of over 750 Mbps

or traffic with packet size of 64 bytes is sent at a speed of over 137 Mbps to the

gateway, the packets are dropped. The transmit-side packet scheduler does not

work when the incoming unidirectional traffic rate is very high. As a

workaround, keep the incoming packet rate below 750 Mbps for 1500

byte-traffic or below 137 Mbps for 64-byte traffic to view the effects of packet

scheduling. [PR/310273] [PR/453094] [PR/454145]

If you configure a T1 or E1 interface, issue the show interface interface-name

command before sending traffic to that interface. The rx_err_hec error counter

under traffic statistics increments and displays a non-zero value. As a

workaround, note down the initial header error control (HEC) error value after

configuring the interface and subtract the initial value from subsequent

statistics values to obtain an actual count of cells with HEC errors. [PR/311480]

If a bypass tunnel is created for a peer loopback address, the backup tunnel

does not come up. If the bypass tunnel is created for a peer loopback address

where a primary tunnel also ends, then the backup tunnel is not created over

that bypass tunnel. As a workaround, configure the bypass tunnel to the peer's

physical interface address (instead of the loopback address). [PR/312644]

The BXOS software does not support the show statistics command for

displaying the configured scheduler. There is no workaround. [PR/312830]

The CLI does not display statistics of packets that are shaped using traffic

shapers. There is no workaround. [PR/312831]

jnxPwEnetVlanMode table does not work for Ethernet PWE through

GigabitEthernet backhaul. The DUT does not display the proper VLAN mode

when the Ethernet PWE is configured with the egress options of None, Strip,

and Replace. Instead of changeVlan, removeVlan is displayed. As a

workaround, IM-DPM structures are used instead of DCL. [PR/314788]

In the absence of a time-zone command, the system time should be set to the

local time. There is no workaround. [PR/314980]

Dynamic changes to a loopback address are not advertised to the peer. As a

workaround, disable OSPF, change the loopback IP address, and then enable

OSPF. [PR/387049]

BXOS 4.1 R2 Software Release Notes

8Outstanding Issues

When more than 5 IS-IS sessions are configured on VLAN interfaces with a

default hello-interval of 3 seconds and hello-multiplier of 10 seconds; ISIS

sessions will flap and cause the BX7000 to crash. As a workaround, configure

the ISIS hello-interval to 15 seconds and the hello-multiplier to 5 seconds.

[PR/387294]

When you configure OAM on a switched connection and send a continuous

stream of OAM cells to the gateway, the OAM cells are not processed but are

dropped. There is no workaround. [PR/389071]

After you configure the link protection and pseudowires over the protected

tunnel, if the primary link is disabled on the gateway side, the traffic switch

times are longer than expected. There is no workaround. [PR/389024]

When you configure fast reroute (FRR), the traffic failover time from the

primary tunnel to the backup tunnel is approximately 300 milliseconds. There

is no workaround. [PR/389024] [PR/410625]

During the BXOS image upgrade, when you issue the request system reboot

command from the serial console of the gateway, the image upgrade process

stops. As a workaround, do not reboot the gateway during the image upgrade.

[PR/390219]

GRE interface configuration requires the input of tunnel parameters along with

interface creation. You cannot create the interface without any related

parameters, and then associate the tunnel parameters at a later point in time.

Similarly, after being created, the parameters cannot be modified. As a

workaround, delete and recreate the interface. [PR/392812]

When you create or delete GRE or RSVP tunnel, the operating system does not

free the allocated memory completely. There is no workaround. [PR/392833]

[PR/392835]

The DUT crashed and rebooted with error messages while executing show ospf

interface detail command with 210 OSPF with MD5 configurations over 210

VLAN interfaces (distributed across 7 Gigabit Ethernet ports including MB and

Addon with 30 units per interface). There is no workaround. [PR/393750 ]

The show mpls tunnel <tunnelname> association command displays the status

of the tunnel as up even if the tunnel is down. The system tries multiple times

to find the backup tunnel for the protected tunnel. If the system does not find

the backup tunnel, after few minutes, it will declare the tunnel as down. There

is no workaround. [PR/397034]

The IPv4 fragmentation feature does not work. As a result, packets that are

greater than the MTU of the outgoing Ethernet interface are dropped. There is

no workaround. [PR/400112]

The traffic with packet size greater than the configured MTU value can pass

over a GRE interface. As a workaround, AAL5 SDU/PDU PWEs can be created

with the PWE MTU to be 12 bytes less than that of the backhaul interface MTU

for PW over RSVP tunnel, and PWE MTU must be less than the GRE tunnel

MTU for PW over GRE tunnel. [PR/400194]

Outstanding Issues 9

BXOS 4.1 R2 Software Release Notes

If you configure the loopback address in a strict path in the RSVP tunnel

configuration, the tunnel does not come up. There is no workaround.

[PR/402069]

When you configure an ATM pseudowire in the AAL5 SDU mode, pass

pseudowire frames, and issue the show statistics l2circuit command, the cyclic

redundancy check (CRC) and size error counters under the Packet Statistics

column display the wrong statistics. As a workaround, save the configuration

and reboot the gateway; the ATM pseudowire comes up with correct packet

statistics. [PR/404150]

While using ATM/AAL5 pseudowires in AAL5 SDU mode, CRC and size error

counters are wrongly incremented in the ATM to PSN direction, but there is no

impact to traffic, only statistics are wrongly reported. There is no workaround.

[PR/404150-2]

When the OSPF protocol is up on the PPP interface, PPP interface deletion fails.

As a workaround, disable the OSPF protocol on the PPP interface and then

delete the PPP interface. [PR/404259]

When two gateways are connected through a VLAN subinterface, traffic is

passed even if the admin state of the interface is down on one of the gateways.

There is no workaround. [PR/404654]

If you close the current SSH session when an image upgrade is in progress, you

cannot upgrade the image by re-opening a new SSH session. As a workaround,

do not terminate the SSH session when an image upgrade is in progress. You

can also reboot the gateway and open an SSH session to upgrade the image.

[PR/405319]

The BXOS CLI does not support the pipe (|) command to match and filter the

output. There is no workaround. [PR/406381]

You cannot delete or disable an existing segment or e2e-endpoint in ATM OAM

configuration over an ATM interface. As a workaround, delete and reconfigure

the ATM interface with required ATM OAM configuration. [PR/407982]

The traffic scheduler does not schedule traffic correctly if the configured

weights are not multiples of ten. There is no workaround. [PR/408434]

The CLI does not support commands to delete the hold-time,

strict-targeted-hellos, and keepalive-timeout parameters at the [edit protocols ldp]

hierarchy level. There is no workaround. [PR/410603]

When you configure fast re-route (FRR), the traffic failover time from the

primary tunnel to the backup tunnel is approximately 300 milliseconds. There

is no workaround. [PR/410625]

After configuring more PPP links and static routes and passing traffic through

those routes, if PPP links are deleted and recreated multiple times, the traffic is

lost. As a workaround, avoid deleting and recreating PPP links multiple times

when traffic is passing through those links. [PR/411490]

The gateway does not support statistics for shaper and scheduler. There is no

workaround. [PR/415309]

BXOS 4.1 R2 Software Release Notes

10 Outstanding Issues

When you reboot the gateway through automation, the CLI displays incorrect

output for the first two show commands. There is no workaround. [PR/416335]

The RMON configuration does not check for case sensitivity of the alarm name.

As a workaround, enter the RMON object name in a upper or lower case.

[PR/419457]

When OSPF area parameters are configured with custom values, if you delete

the area and reconfigure it, the OSPF area takes the old custom values, not the

default values. As a workaround, delete the OSPF protocol and reconfigure it or

configure the OSPF area parameters. [PR/419581]

The BXOS CLI does not support delete commands to clear the SNMP name and

description. There is no workaround. [PR/420248]

The show snmp command does not display the system name configured for

SNMP. As a workaround, use the show configuration command to view the

configured system name. [PR/421075]

When you create an ATM traffic profile with alpha-numeric naming convention

and associate the profile to an ATM interface, the BXOS software considers

only the numeric convention as input. As a workaround, use only the numeric

convention for naming the ATM traffic profile so that the profile is associated to

the ATM interface. [PR/421097] [PR/421239]

When traffic is passing through a PPP interface, if you modify the clock source

for that interface continuously several times, the CLI stops responding. As a

workaround, do not configure the clock source continuously. [PR/421446]

While configuring a TDM link to be part of an IMA group, if you supply an

existing link-id parameter, the interface configuration fails. However, internally

it creates the interface with default trans encapsulation. When you attempt to

reconfigure the interface with a correct link-id, the command still fails. As a

workaround, delete and reconfigure the existing TDM interface, and then

configure the link-id. [PR/421939]

When you configure ATM pseudowires, pass traffic, and delete the MPLS

protocol on an Ethernet interface, the tunnels and pseudowires came down but

ATM pseudowire frames are switched. There is no workaround. [PR/423215]

If you configure more than 43 MF classifiers on the gateway, the configuration

fails. As a workaround, configure fewer than 43 MF classifiers on the gateway.

[PR/424024]

The SNMP Get, GetNext, and walk queries do not return values for the MPLS

PWE3 MIB table. There is no workaround. [PR/424210]

When OSPF BFD is up, if the gateway loopback IP is deleted and configured

again the OSPF sessions do not come up. As a workaround, do not delete the

loopback IP when OSPF BFD is running. [PR/426770]

The CLI supports modifying the SNMPv3 trap and inform configurations, but

does not support commands to delete the configurations. As a workaround,

create a new target address for the SNMPv3 trap and inform. [PR/428706]

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