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BLADE OS 5.1 Release Notes

12

BMD00098, December 2009

Internal Loopback Interface

BLADEOS 5.1 now supports up to five loopback interfaces.

A loopback interface is an interface which is assigned an IP address, but is not associated with any 
particular physical port. The loopback interface is thus always available for higher layer protocols 
to use and advertise to the general network, regardless of which specific ports are in operation.

Loopback interfaces can be of benefit in a number of protocols, improving access to a switch, as 
well as increasing its reliability, security, and scalability. In addition, loopback interfaces can add 
flexibility and simplify management, information gathering, and filtering.

One example of this increased reliability is for OSPF to use a loopback interface in combination 
with host routes to advertise an interface route which will be available regardless of the status of 
individual physical links. This provides a higher probability that the routing traffic will be received 
and subsequently forwarded.

Further reliability and performance could be provided by configuring parallel BGP paths to a 
loopback interface on a peer device, which would result in improved load sharing.

Access and security can be improved through filtering. Incoming traffic can be filtered by rules that 
specify loopback interfaces as the only acceptable destination addresses.

Information gathering and filtering as well as management can potentially be simplified if protocols 
such as SNMP use loopback interfaces for receiving and sending trap and log type information.

The Loopback Interface configuration menu is accessed using the following CLI command:

Rate Limiting

BLADEOS 5.1 now supports traffic rate limits for packets broadcast, multicast, and unknown 
unicast packets. For each port, the maximum number of packets permitted per second for each 
packet type can be specified. The following commands have been added to the Port menu 
(

/cfg/port

<x>

) to support rate limiting:

brate

<value>

|dis

Broadcast limit, 0 to 262143 packets per second, or no limit.

mrate

<value>

|dis

Multicast limit, 0 to 262143 packets per second, or no limit.

drate

<value>

|dis

Unknown unicast limit, 0 to 262143 packets per second, or no limit.

/cfg/l3/loopif

<loopback interface number (1-5)>

Содержание BLADEOS 5.1

Страница 1: ...50 Mission College Blvd Suite 600 Santa Clara CA 95054 www bladenetwork net BLADEOS Release Notes 1 10Gb Uplink Ethernet Switch Module for IBM BladeCenter Version 5 1 Part Number BMD00098 December 200...

Страница 2: ...ical data and commercial software documentation as those terms are used in FAR 12 211 12 212 Oct 1995 Government End Users are authorized to use this documentation only in accordance with those rights...

Страница 3: ...for the 1 10Gb Uplink Ethernet Switch Module for IBM BladeCenter BLADEOS 5 1 Command Reference for the 1 10Gb Uplink Ethernet Switch Module for IBM BladeCenter BLADEOS 5 1 ISCLI Reference for the 1 1...

Страница 4: ...ded network switch that features tight integration with IBM BladeCenter management modules Figure 1 1 10Gb Uplink ESM Faceplate The GbESM has the following port capacities Three external 10Gb SFP slot...

Страница 5: ...witch disables the port and generates a syslog message indicating that the DAC is not approved The GbESM does not disable the SFP ports when using MSA compliant DAC cables For best results the followi...

Страница 6: ...two different software images called image1 and image2 as well as boot software called boot When you load new software you must specify where it should be placed either into image1 image2 or boot For...

Страница 7: ...ftware will load into the switch 7 When loading is complete enter the following command at the Boot Options prompt 8 The system informs you of which software image image1 or image2 is currently set to...

Страница 8: ...er if applicable 5 The system prompts you to confirm your request Once confirmed the software will load into the switch 6 When loading is complete use the following command in Global Configuration mod...

Страница 9: ...onfiguration Management page appears 3 If you are loading software from your computer HTTP client skip this step and go to the next Otherwise if you are loading software from a FTP TFTP server enter t...

Страница 10: ...efined events An RMON management application can be used to access RMON MIB information on the GbESM as described in RFC 1757 The switch supports RMON Group 1 Statistics Group 2 History Group 3 Alarms...

Страница 11: ...EE 802 3ah Operation Administration and Maintenance OAM protocol OAM allows the switch to detect faults on physical port links Using OAM if the Local Information that a port sends does not match the R...

Страница 12: ...arded Further reliability and performance could be provided by configuring parallel BGP paths to a loopback interface on a peer device which would result in improved load sharing Access and security c...

Страница 13: ...o active interfaces but do not receive LSAs hello packets or any other OSPF protocol information from active interfaces Passive interfaces behave as stub networks allowing OSPF routing devices to be a...

Страница 14: ...5 1 the implementation of Access Control Lists ACLs has been standardized to use ascending order of precedence ACLs that are assigned to a port are now processed in numeric sequence based on ACL numb...

Страница 15: ...info vlan command permits the following options The numbers in a range must be separated by a dash start of range end of range Multiple ranges or list items are permitted using a comma range or item 1...

Страница 16: ...link information info link for switches installed in bay 1 and bay 2 Alias Port Speed Duplex Flow Ctrl Link TX RX INT1A 1 1000 full yes yes up INT1B 2 1000 full yes yes up INT2A 3 1000 full yes yes u...

Страница 17: ...rn Fld PVID NAME VLAN s INT1A 1 y n e e 1 INT1A 1 4095 INT1B 2 y n e e 1 INT1B 1 4095 INT2A 3 y n e e 1 INT2A 1 4095 INT2B 4 y n e e 1 INT2B 1 4095 INT3A 5 y n e e 1 INT3A 1 4095 INT3B 6 y n e e 1 INT...

Страница 18: ...BLADEOS 5 1 now also supports PVRST Alias Port Tag Fast Lrn Fld PVID NAME VLAN s INT1 1 y n e e 1 INT1 1 4095 INT2 2 y n e e 1 INT2 1 4095 INT3 3 y n e e 1 INT3 1 4095 INT4 4 y n e e 1 INT4 1 4095 IN...

Страница 19: ...The following table correlates the Firmware Type listed in the IBM management module s Web interface Firmware VPD window to the GbESM software version Within the IBM management module Web interface th...

Страница 20: ...and the management module go to the I O Module Configuration window on the management module s Web interface Under the New Static IP Configuration section click Save to trigger the management module t...

Страница 21: ...hree server keys 1 One key is generated to replace the current server key if used 2 A second key is generated as a spare in case the current server key is used and the specified interval expires 3 A t...

Страница 22: ...e for each switch a single SYSLOG server can distinguish between the various GbESMs in the network Refer to System Host Log Configuration in the BLADEOS 5 1 Command Reference Internal Port Autonegotia...

Страница 23: ...IGMP Relay When having joins from multiple VLANs and the multicast data transmitter is on a VLAN that did not receive any joins multicast data is routed only if the flood option is disabled using the...

Страница 24: ...if the external device is changed first the external device may erroneously report the link as DOWN even after the GbESM is changed to 10 Mbps Solution At the external device disconnect and reconnect...

Страница 25: ...problem occurs the GbESM continuously displays the following messages at the console WARNING packet_sent u 0 dv_active tx ring full packet_sent dcnt 114 public1 110 vcnt 1025 Solution Remove the loop...

Страница 26: ...Password with automatic expiration the password might not expire if the system date and time is not configured first Use of a Network Time Protocol NTP server resolves this issue Solution When you con...

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