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January 7, 2000
This document provides the current Catalyst 2948G-L3 software features and caveats for Cisco IOS Release 12.0 (7)WX5(15a).
These release notes include the following sections:
The Catalyst 2948G-L3 is a high-performance Layer 3 switch router. It is optimized for the campus LAN or the intranet and provides both wirespeed Ethernet routing and switching services.
A Layer 3 switch router performs the following three major functions:
Compared to other routers, Layer 3 switch routers process more packets faster by using application-specific integrated circuit (ASIC) hardware instead of microprocessor-based engines. Layer 3 switch routers also improve network performance with two software functions---route processing and intelligent network services.
The base Cisco IOS Release 12.0(7)WX5(15a) software, which includes RIP and RIP 2, comes with the Catalyst 2948G-L3 switch router. Use license number FR2948GL3-IP to order software that includes OSPF, IGRP, and EIGRP. Use license number FR2948GL3-IPX to order software that includes IPX switching functionality.
This section describes the system requirements for the Catalyst 2948G-L3 switch router for Cisco IOS Release 12.0(7)WX5(15a) and includes the following sections:
The standard default memory for the Catalyst 2948G-L3 switch router is 64 MB of SDRAM and 16 MB of onboard Flash ROM.
The Catalyst 2948G-L3 switch router is a fixed configuration, multiprotocol 10/100/1000 Ethernet switch router. There are 48 high-density 10/100BaseT Fast Ethernet and two 802.3z Gigabit Ethernet ports on the switch router.
To determine the version of the Cisco IOS software currently running on the Catalyst 2948G-L3 switch router, log in to the switch router and enter the show version EXEC command.
Cisco IOS software is packaged in feature sets or software images that vary according to the platform. Table 1 lists the Cisco IOS software feature sets available for the Catalyst 2948G-L3 switch router for Cisco IOS Release 12.0(7)WX5(15a).
Feature Set |
---|
Layer 2 Bridging Features |
Layer 2 transparent bridging |
Layer 2 MAC learning, aging, and switching by hardware |
Spanning Tree Protocol (IEEE 802.1D) per bridge group |
Support for a maximum of 16 active bridge groups |
Up to 4K MAC addresses |
Integrated routing and bridging (IRB) |
24K content addressable memory (CAM) is shared by Layer 2 entries, IP routing, IP multicast routing, and Novell IPX routing |
Virtual LAN (VLAN) Features |
Inter-Switch Link (ISL)-based VLAN trunking |
802.1Q-based VLAN trunking |
Layer 3 Routing, Switching, and Forwarding |
IP, IPX, and IP multicast routing and switching between Ethernet ports |
Constrained multicast flooding (CMF) |
QoS-based forwarding based on IP precedence based forwarding |
Load balancing among equal cost paths based on source and destination IP and IPX addresses |
24K content addressable memory (CAM) is shared by Layer 2 entries, IP routing, IP multicast routing, and Novell IPX routing |
Up to 18K IP routes |
Up to 20K IP host entries |
Up to 20K IPX routes |
Up to 20K IPX host entries |
Up to 128 IP multicast groups |
Supported Routing Protocols |
Routing Information Protocol (RIP and RIP II) |
Interior Gateway Routing Protocol (IGRP) |
Enhanced Interior Gateway Routing Protocol (EIGRP) |
Open Shortest Path First (OSPF) |
Internet Packet Exchange (IPX), RIP, and EIGRP |
Protocol Independent Multicast (PIM)---sparse and dense modes |
Secondary addressing |
Static routes |
Fast EtherChannel (FEC) Features |
Bundling of up to four Fast Ethernet ports |
Load sharing based on source and destination IP and IPX addresses of unicast packets |
Load sharing for bridge traffic based on MAC address |
Inter-Switch Link (ISL) on the Fast EtherChannel |
Integrated routing and bridging (IRB) on the Fast EtherChannel |
802.1Q trunking on the Fast EtherChannel |
Up to 16 active FEC and 1 active GEC port channels |
Gigabit EtherChannel (GEC) Features |
Bundling the two Gigabit Ethernet ports |
Load sharing based on source and destination IP or IPX addresses of unicast packets |
Load sharing for bridge traffic based on MAC address |
Inter-Switch Link (ISL) on the Gigabit EtherChannel |
Integrated routing and bridging (IRB) on the Gigabit EtherChannel |
802.1Q trunking on the Gigabit EtherChannel |
Up to 16 active FEC and 1 active GEC port channels in one system |
Additional Protocols and Features |
Bootstrap Protocol (BOOTP) |
Cisco Discovery Protocol (CDP) support on Ethernet ports |
Cisco Group Management Protocol (CGMP) server support |
Dynamic Host Configuration Protocol (DHCP) relay |
Hot Standby Routing Protocol (HSRP) over 10/100 Ethernet, Gigabit Ethernet, FEC, GEC, and BVI (Bridge Group Virtual Interface) |
Internet Control Message Protocol (ICMP) |
Internet Group Management Protocol (IGMP) |
Internet Packet Exchange Service Advertisement Protocol (IPX SAP) and SAP filtering |
Integrated routing and bridging (IRB) routing mode support |
Table 2 lists the features that are not supported on the Catalyst 2948G-L3 switch router.
Features Not Supported |
---|
Layer 2 source MAC address filtering with standard ACL |
Layer 3 filtering using ACL:
|
User Datagram Protocol (UDP) turbo flooding |
802.1Q bridging |
Border Gateway Protocol (BGP) |
Port-based snooping |
DEC spanning tree |
IPX per packet load balancing |
AppleTalk 1 and 2 routing |
AppleTalk Routing Table Maintenance Protocol (RTMP) |
AppleTalk Update-based Routing Protocol (AURP) |
Layer 3 switching software on the Catalyst 2948G-L3 switch router features the switching database manager (SDM). SDM resides on the central processor and its primary function is to maintain the Layer 3 switching database in ternary content addressable memory (TCAM). SDM maintains the address entries contained in TCAM in an appropriate order. SDM manages TCAM space by partitioning protocol-specific switching information into multiple regions.
The key benefit of SDM in Layer 3 switching is its ability to configure the size of the protocol regions in TCAM. SDM enables exact-match and longest-match address searches, which result in high-speed forwarding.
For additional information on SDM, refer to the Catalyst 2948G-L3 Software Feature and Configuration Guide.
Table 3 lists the caveats that were introduced and resolved on the Catalyst 2948G-L3 switch router for Cisco IOS Release 12.0(7)WX5(15a). In Table 3, "Y" indicates a fixed caveat and "N" indicates an open caveat.
DDTS Number | 12.0(7)WX5(15a) |
---|---|
CSCdp56448 | N |
CSCdp56078 | N |
CSCdp54671 | N |
CSCdp53262 | N |
CSCdp53223 | N |
CSCdp51343 | N |
CSCdp49816 | N |
CSCdp49222 | N |
CSCdp47633 | N |
CSCdp43594 | N |
CSCdp43113 | N |
CSCdp42656 | N |
CSCdp38250 | N |
CSCdp37972 | N |
CSCdp33630 | N |
CSCdp29353 | N |
CSCdp27003 | N |
CSCdp24876 | N |
CSCdp17494 | N |
CSCdp13515 | N |
CSCdm73215 | N |
CSCdm57720 | N |
%FX1000-3-TOOBIG: FX1000(0/0), packet too big (1578), from 0035.0023.010
%CEF hwidb not found for BVI1.
00:26:56: %SYS-3-CPUHOG: Task ran for 5444 msec (1241/370), process = IPX Event Mgr, PC = 600AA140.
02:27:24: %SYS-3-CPUHOG: Task ran for 2392 msec (515/42), process = Exec, PC = 6003F6CC.
02:44:19: %SYS-3-CPUHOG: Task ran for 6696 msec (1311/3), process = Exec, PC = 600AA140.
Note Generally, only management data, transmitted at a very low rate, would be seen on the native VLAN, since it is mainly used for network management purposes. |
00:00:38: %SYS-3-CPUHOG: Task ran for 3084 msec (437/1), process = CDP Protocol, PC = 6015BD40.
This section describes Catalyst 2948G-L3 switch router error messages.
%LSS-1-SDM: IP Multicast, Region reached limit Cannot accept more entries
Explanation Cannot accept any more routes in SDM.
Action To rectify this situation, increase the protocol size using the sdm size configuration command and reload the switch router.
7:28:06:%LSS-4-INTERFACE:(Interface FastEthernet2) CAM reached limit. Cannot
accept more route entries
Explanation Cannot accept more routes in CAM.
Action None.
This section describes the documentation available for the Catalyst 2948G-L3 switch router. Both printed manuals and electronic documents are available.
The most current documentation is available on Cisco Connection Online (CCO) and the Documentation CD-ROM. These electronic documents might contain updates and modifications made after the hard-copy documents were printed.
Use these release notes with the following documents:
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Note If you purchased your product from a reseller, you can access CCO as a guest. CCO is Cisco Systems' primary real-time support channel. Your reseller offers programs that include direct access to CCO services. |
For service and support for a product purchased directly from Cisco, use CCO.
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