Cisco Cisco IOS Software Release 12.2(14)ZA
Benefits
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Cisco IOS Release 12.2(14)ZA6
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The IOS SLB RADIUS username sticky database associates each subscriber’s username with a
specific service gateway.
specific service gateway.
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In a CDMA2000 mobile wireless network, to route packets correctly, IOS SLB requires both the
RADIUS framed-IP sticky database and either the RADIUS username sticky database or the
RADIUS calling-station-ID sticky database.
RADIUS framed-IP sticky database and either the RADIUS username sticky database or the
RADIUS calling-station-ID sticky database.
WAP Load Balancing
You can use IOS SLB to load-balance Wireless Session Protocol (WSP) sessions among a group of WAP
gateways or servers on an IP bearer network. WAP runs on top of UDP on a set of well known ports, with
each port indicating a different WAP mode:
gateways or servers on an IP bearer network. WAP runs on top of UDP on a set of well known ports, with
each port indicating a different WAP mode:
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Connectionless WSP mode (IP/UDP [9200]/WSP). In connectionless WSP mode, WSP is a simple
one-request/one-response protocol in which a single server-bound packet results in a server response
of one or more packets.
one-request/one-response protocol in which a single server-bound packet results in a server response
of one or more packets.
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Connection-oriented WSP mode (IP/UDP [9201]/WTP/WSP). In connection-oriented WSP mode,
WTP handles retransmissions of WDP events, and WSP operates using a defined session
bring-up/tear-down sequence. IOS SLB uses a WAP-aware finite state machine (FSM), driven by
events in WSP sessions, to reassign sessions. This FSM operates only on port 9201, where the WSP
sessions are not encrypted and WTP handles retransmissions.
WTP handles retransmissions of WDP events, and WSP operates using a defined session
bring-up/tear-down sequence. IOS SLB uses a WAP-aware finite state machine (FSM), driven by
events in WSP sessions, to reassign sessions. This FSM operates only on port 9201, where the WSP
sessions are not encrypted and WTP handles retransmissions.
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Connectionless secure WSP mode (IP/UDP [9202]/WTLS/WSP). This mode functions the same as
connectionless WSP mode, but with security provided by WTLS.
connectionless WSP mode, but with security provided by WTLS.
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Connection-oriented secure WSP mode (IP/UDP [9203]/WTLS/WTP/WSP). This mode functions
the same as connection-oriented WSP mode, but with security provided by WTLS.
the same as connection-oriented WSP mode, but with security provided by WTLS.
IOS SLB uses WSP probes to detect failures in the WAP stack on port 9201.
Stateful Backup of Redundant Route Processors
When used with RPR+, IOS SLB supports the stateful backup of redundant route processors for CMX
for Catalyst 6500 Family Switches and Cisco 7600 Internet Routers. This enables you to deploy Cisco
Multiprocessor WAN Application Modules (MWAMs) in the same chassis as IOS SLB, while
maintaining high availability of load-balancing assignments.
for Catalyst 6500 Family Switches and Cisco 7600 Internet Routers. This enables you to deploy Cisco
Multiprocessor WAN Application Modules (MWAMs) in the same chassis as IOS SLB, while
maintaining high availability of load-balancing assignments.
Flow Persistence
Flow persistence provides intelligent return routing of load-balanced IP flows to the appropriate node,
without the need for coordinated hash mechanisms on both sides of the load-balanced data path, and
without using Network Address Translation (NAT) or proxies to change client or server IP addresses.
without the need for coordinated hash mechanisms on both sides of the load-balanced data path, and
without using Network Address Translation (NAT) or proxies to change client or server IP addresses.
Benefits
IOS SLB shares the same software code base as Cisco IOS and has all the software features sets of
Cisco IOS software. IOS SLB is recommended for customers desiring complete integration of SLB
technology into traditional Cisco switches and routers.
Cisco IOS software. IOS SLB is recommended for customers desiring complete integration of SLB
technology into traditional Cisco switches and routers.
On Cisco Catalyst 6500 Family Switches, IOS SLB takes advantage of hardware acceleration to forward
packets at very high speed when running in dispatched mode.
packets at very high speed when running in dispatched mode.