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Matching Cisco and System p
1.
IBM System p,
AIX & Linux Aktuell 2008 Matching Network Parameters between IBM System p and CISCO Networks Alexander Paul Netmakers IT-Consulting paulalex@de.ibm.com © 2008 Alexander Paul
2.
Matching Network Parameters
between IBM System p and CISCO Networks Networking on IBM System p POWER4/AIX5.2 POWER6/AIX6 Network Enhancements Advanced Virtual Networking • Link Aggregation (EtherChannel, IEEE 802.3ad) • Integrated Virtual Ethernet (IVE) Enhancements • Advanced VLAN Features • Virtual LAN (VLAN) & VLAN trunking (dot1q) (GARP, VLAN Filtering) • IPv6 • Performance Optimization • Multipath Routing • Path MTU discovery (PMTU) • Quality of Service (QoS) • Virtual IP Addresses (VIPA) POWER5/AIX5.3 Virtual Networking • Virtual Ethernet • Shared Ethernet Adapter (SEA) • VLAN Trunking (dot1q) • 10 Gigabit Ethernet & InfiniBand • High Availability for Virtual Networking 2 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
3.
Matching Network Parameters
between IBM System p and CISCO Networks There are many interesting connection points … In this session, we focus on two topics: – Link Aggregation (LA): Discover how LA works by looking on perfomance behavior and the confguration on both sites (AIX and Cisco). – Multiple VLANs: Connection on Cisco catalyst switches to provide a full VLAN connectivity to the Virtual I/O server. 3 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
4.
Matching Network Parameters
between IBM System p and CISCO Networks Link Aggregation ent0 eth0 ent1 ent3 ent2 4 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
5.
Matching Network Parameters
between IBM System p and CISCO Networks What exactly is Link Aggregation (LA)? LA is a logical grouping of physical ports. There are different namings for the same things on AIX and Cisco: – EtherChannel (AIX/Cisco) Means a cisco proprietary protocol, named PAgP. EtherChannel is a trademark of Cisco. – Aggregate Port (AIX/Cisco) – Port Channel (Cisco) – Channel Group (Cisco) 5 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks What is Link Aggregation used for? Eliminates SPOF on physical adapter connections – Very efficient with less failover latency – Several tuning points to fit the LA to your network behavior – Hot adapter add, remove or replace May improve overall throughput – More about this in only a few slides… 6 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Link Aggregation protocols Cisco EtherChannel (PAgP) – Cisco proprietary – Uses a logical PortChannel on Cisco site that can bundle up to 8 physical ports. – Supported by AIX and VIOS – Supports load balancing mechanisms IEEE 802.3ad (LACP) – Supported by Cisco and other switch vendors – Supported by AIX, VIOS and Linux bonding – Supports load balancing mechanisms 7 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks How does a LA protocol works? When you configure one end of a link aggregation in either PAgP or LACP mode, it negotiates with the other end to determine which ports would become active. Incompatible ports are automatically suspended. Protocol negotiation ent0 Switch ent1 ent3 AIX ent2 8 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks What to do before configuring Link Aggregation? On AIX site: Configure speed and duplex settings for each adapter ports. Know the workload from AIX to switch. IBM System p Cisco Catalyst On Switch site: Configure speed and duplex settings for each switchport. A appropriate description on switchports to be aggregate may be helpful in case of trouble. Know the workload leaving the switch through the portchannel. IBM System p Cisco Catalyst 9 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Configuring Link Aggregation (IEEE 802.3ad) aix61server2 1. Add a new Link Aggregation: aix61server2:/#smitty addethch1 LA ent3 2. Select the adapters for the active channel: > ent0 active Physical Adapters ent0 ent1 ent2 > ent1 active ent2 backup 3. Configure LA-mode, backup and load balacing: Add An EtherChannel / Link Aggregation Type or select values in entry fields. Press Enter AFTER making all desired changes. [Entry Fields] EtherChannel / Link Aggregation Adapters ent0,ent1 + Enable Alternate Address no Alternate Address [] Enable Gigabit Ethernet Jumbo Frames no Mode 8023ad Hash Mode default Backup Adapter ent2 Automatically Recover to Main Channel yes Perform Lossless Failover After Ping Failure yes Internet Address to Ping [9.155.62.1] Number of Retries [3] Retry Timeout (sec) [1] 10 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Configuring Link Aggregation (IEEE 802.3ad) 4. Configure IP-Address, DNS and routing: aix61server2 aix61server2:/#smitty tcpip │ en0 Standard Ethernet Network Interface │ en1 Standard Ethernet Network Interface LA │ en2 Standard Ethernet Network Interface │ en3 Standard Ethernet Network Interface ent3 │ et0 IEEE 802.3 Ethernet Network Interface │ et1 IEEE 802.3 Ethernet Network Interface │ et2 IEEE 802.3 Ethernet Network Interface Physical Adapters ent0 ent1 ent2 │ et3 IEEE 802.3 Ethernet Network Interface * HOSTNAME [aix61server2] * Internet ADDRESS (dotted decimal) [9.155.66.95] Network MASK (dotted decimal) [255.255.240.0] * Network INTERFACE en3 NAMESERVER Internet ADDRESS (dotted decimal) [9.155.62.5] DOMAIN Name [ibm.com] Default Gateway Address (dotted decimal or symbolic name) [9.155.62.1] 5. Show LA-Attributes: aix61server2:/#lsattr -El ent3 adapter_names ent0,ent1 EtherChannel Adapters True alt_addr 0x000000000000 Alternate EtherChannel Address True auto_recovery yes Enable automatic recovery after failover True backup_adapter ent2 Adapter used when whole channel fails True hash_mode default Determines how outgoing adapter is chosen True mode 8023ad EtherChannel mode of operation True netaddr 9.155.62.1 Address to ping True noloss_failover yes Enable lossless failover after ping failure True num_retries 3 Times to retry ping before failing True retry_time 1 Wait time (in seconds) between pings True use_alt_addr no Enable Alternate EtherChannel Address True use_jumbo_frame no Enable Gigabit Ethernet Jumbo Frames True 11 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
12.
Matching Network Parameters
between IBM System p and CISCO Networks Configuring Link Aggregation (IEEE 802.3ad) A. Setup the PortChannel No. 1: Cat_3560_1 FastEthernet 0/9 Cat_3560_1(config)#interface range fastEthernet 0/9 - 10 ent0 ent1 AIX Cat_3560_1(config-if-range)#channel-group 1 mode ? ent2 active Enable LACP unconditionally FastEthernet 0/10 auto Enable PAgP only if a PAgP device is detected desirable Enable PAgP unconditionally on Enable Etherchannel only passive Enable LACP only if a LACP device is detected Cat_3560_1(config-if-range)#channel-group 1 mode passive Creating a port-channel interface Port-channel 1 12 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
13.
Matching Network Parameters
between IBM System p and CISCO Networks Configuring Link Aggregation (IEEE 802.3ad) B. Show the result FastEthernet 0/9 Cat_3560_1#show etherchannel summary ent0 Flags: D - down P - in port-channel ent1 AIX I - stand-alone s - suspended ent2 H - Hot-standby (LACP only) FastEthernet 0/10 R - Layer3 S - Layer2 u - unsuitable for bundling U - in use f - failed to allocate aggregator d - default port Number of channel-groups in use: 1 Number of aggregators: 1 Group Port-channel Protocol Ports ------+-------------+-----------+------------------------- 1 Po1(SU) LACP Fa0/9(Pd) Fa0/10(P) PortChannel is UP All Switchports are part of the channel IEEE 802.3ad 13 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Configuring Link Aggregation (IEEE 802.3ad) LACP negotiation A. Debug the creation process: ent0 Cat_3560_1#debug etherchannel event ent1 AIX ent2 %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to down FEC: lacp_fec_dontbundle_internal: Fa0/10 FEC: lacp_fec_dontbundle_internal: Fa0/9 %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up FEC: lacp_fec_unbundle_internal: Fa0/10 FEC: lacp_switch_add_port_to_associated_list: Fa0/10 added to list for Po1 FEC: lacp_fec_unbundle_internal: Fa0/9 FEC: lacp_switch_get_first_agg_id_from_admin_oper_keys: found aggregator Po1 for admin_key [0x1] and oper_key [0x1] FEC: lacp_switch_get_first_associated_port_from_agg_id: found port Fa0/10 associated to Po1 FEC: lacp_switch_add_port_to_associated_list: Fa0/9 added to list for Po1 %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down FEC: lacp_switch_add_port_to_agport_internal: Fa0/9 added to aggregator Po1 list FEC: lacp_switch_add_port_to_agport_internal: Fa0/10 added to aggregator Po1 list %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to up %LINK-3-UPDOWN: Interface Port-channel1, changed state to up 14 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Test AIX Link Aggregation throughput 192.168.1.161 GigabitEthernet 0/1 FastEthernet 0/9 192.168.1.160 ent0 Linux eth0 ent1 ent3 AIX ent2 Server FastEthernet 0/10 Client application application Traffic direction ------------------------------------------------------------ Client connecting to 192.168.1.161, TCP port 5001 TCP window size: 256 KByte (default) ------------------------------------------------------------ One TCP session: [ 3] local 192.168.1.160 port 32838 connected with 192.168.1.161 port 5001 [ 3] 0.0-10.0 sec 112 MBytes 94.2 Mbits/sec ------------------------------------------------------------ Client connecting to 192.168.1.161, TCP port 5001 TCP window size: 256 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.1.160 port 32840 connected with 192.168.1.161 port 5001 Two TCP sessions: [ 3] local 192.168.1.160 port 32839 connected with 192.168.1.161 port 5001 [ 3] 0.0-10.0 sec 56.5 MBytes 45.2 Mbits/sec [ 4] 0.0-10.0 sec 55.5 MBytes 44.4 Mbits/sec [SUM] 0.0-10.0 sec 112 MBytes 93.9 Mbits/sec 15 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Load Balacing for AIX link aggregation Hash_Mode: Default uses a hash of the last byte of the IP address to select the output adapter (or MAC address for non-IP frames) Other possible load balancing methods are: – Per Layer 4 source port (src_port) – Per Layer 4 destination sort (dst_port) – Per Layer 4 source and destination port (src_dst_port) Can only be changed by removing the LA. 16 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Change load balancing hash mode ent0 Linux eth0 ent1 ent3 AIX ent2 aix61server2:/#ifconfig en3 detach aix61server2:/#rmdev –dl ent3 aix61server2:/#smitty etherchannel […] aix61server2:/#lsattr -El ent3 adapter_names ent0,ent1 EtherChannel Adapters True alt_addr 0x000000000000 Alternate EtherChannel Address True auto_recovery yes Enable automatic recovery after failover True backup_adapter ent2 Adapter used when whole channel fails True hash_mode src_dst_port Determines how outgoing adapter is chosen True mode 8023ad EtherChannel mode of operation True netaddr 192.168.1.111 Address to ping True noloss_failover yes Enable lossless failover after ping failure True num_retries 3 Times to retry ping before failing True retry_time 1 Wait time (in seconds) between pings True use_alt_addr no Enable Alternate EtherChannel Address True use_jumbo_frame no Enable Gigabit Ethernet Jumbo Frames True 17 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Test AIX Link Aggregation throughput 192.168.1.161 GigabitEthernet 0/1 FastEthernet 0/9 192.168.1.160 ent0 Linux eth0 ent1 ent3 AIX ent2 Server FastEthernet 0/10 Client application application Traffic direction ------------------------------------------------------------ Client connecting to 192.168.1.161, TCP port 5001 TCP window size: 256 KByte (default) ------------------------------------------------------------ Two TCP sessions: [ 4] local 192.168.1.160 port 32857 connected with 192.168.1.161 port 5001 [ 3] local 192.168.1.160 port 32856 connected with 192.168.1.161 port 5001 [ 3] 0.0-10.0 sec 109 MBytes 87.2 Mbits/sec [ 4] 0.0-10.0 sec 110 MBytes 88.0 Mbits/sec [SUM] 0.0-10.0 sec 168 MBytes 175.2 Mbits/sec 18 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Test switch Link Aggregation throughput 192.168.1.161 GigabitEthernet 0/1 FastEthernet 0/9 192.168.1.160 ent0 Linux eth0 ent1 ent3 AIX ent2 Client FastEthernet 0/10 Server application application Traffic direction ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 16.0 KByte (default) One session: ------------------------------------------------------------ [ 4] local 192.168.1.160 port 5001 connected with 192.168.1.161 port 48471 [ 4] 0.0-10.0 sec 112 MBytes 93.6 Mbits/sec [ 4] local 192.168.1.160 port 5001 connected with 192.168.1.161 port 48472 [ 5] local 192.168.1.160 port 5001 connected with 192.168.1.161 port 48473 Two sessions: [ 4] 0.0-10.0 sec 56.1 MBytes 47.0 Mbits/sec [ 5] 0.0-10.0 sec 56.2 MBytes 47.1 Mbits/sec [SUM] 0.0-10.0 sec 112 MBytes 94.1 Mbits/sec 19 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Test Link Aggregation (IEEE 802.3ad) on Cisco 192.168.1.161 GigabitEthernet FastEthernet 0/9 192.168.1.160 Linux eth0 0/1 ent0 ent1 ent3 AIX ent2 Linux eth0 GigabitEthernet FastEthernet 0/10 0/2 Server application 192.168.1.180 Traffic direction aix61server2:/#iperf -s [ 4] local 192.168.1.160 port 5001 connected with 192.168.1.180 port 52277 [ 5] local 192.168.1.160 port 5001 connected with 192.168.1.161 port 36500 [ 5] 0.0-10.0 sec 111 MBytes 93.2 Mbits/sec [ 4] 0.0-10.0 sec 107 MBytes 94.0 Mbits/sec [SUM] 0.0-10.0 sec 218 MBytes 187.2 Mbits/sec 20 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Load Balacing for Cisco port channels Cisco switches uses load balancing by source mac-address. Cat_3560_2#show etherchannel load-balance EtherChannel Load-Balancing Operational State (src-mac): Non-IP: Source MAC address IPv4: Source MAC address IPv6: Source IP address Availability of other load balancing methods depends on switch model: Cat_3560_2(config)#port-channel load-balance ? dst-ip Dst IP Addr dst-mac Dst Mac Addr src-dst-ip Src XOR Dst IP Addr src-dst-mac Src XOR Dst Mac Addr src-ip Src IP Addr src-mac Src Mac Addr Load balancing can be changed dynamically. 21 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Troubleshooting Link Aggregation on AIX aix61server2:/#entstat -d ent3 […] Number of adapters: 2 Operating mode: Standard mode (IEEE 802.3ad) IEEE 802.3ad Link Aggregation Statistics: Aggregation status: Aggregated Received LACPDUs: 18 This indicates a successful LA negotiation. Transmitted LACPDUs: 18 Received marker PDUs: 0 Transmitted marker PDUs: 0 Received marker response PDUs: 0 Transmitted marker response PDUs: 0 Received unknown PDUs: 0 Received illegal PDUs: 0 Hash mode: Destination IP address […] 22 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Troubleshooting on Cisco switches show etherchannel summary – Lists the status of a port channel and the associated switchports – Lists the configured protocol or mode for the port channel. show etherchannel detail – Lists detailed information about the switchport behavior. debug etherchannel event – Gives live report to the console regarding important etherchannel events. – Good for tracing a problem during the configuration process. 23 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Link Aggregation and POWER6 IVE Client LPAR 1 Client LPAR 2 Client LPAR 3 (LA) (LA) LOG LOG LOG LOG LOG PORT PORT PORT PORT PORT HEA Switch HEA Switch HEA Switch HEA Switch 4 Port IVE Adapter 24 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
25.
Matching Network Parameters
between IBM System p and CISCO Networks Virtualization in a switched environment Cisco Catalyst 6500 Virtual Switching System (VSS) 1440 – Cisco Catalyst 6500 VSS 1440 enables multiple Catalyst 6500 switches to be pooled into one virtual switch, simplifying network management, increasing availability, and optimizing switch resources. – Cisco Catalyst 6500 VSS enables interchassis stateful failover capabilities while Smart Call Home service reduces resolution time for Catalyst 6500 issues. In-service software upgrades enhance availability on both the Catalyst 6500 and Catalyst 4500 platforms. 25 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
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Matching Network Parameters
between IBM System p and CISCO Networks Multiple VLAN support 26 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
27.
Matching Network Parameters
between IBM System p and CISCO Networks Cisco Switch configuration for VIO environment VIOS 1 Client 1 Client 2 en2 en1 (if) (if) ent2 en0 en1 ent1 en0 (SEA) (if) (if) VLAN (if) ent0 ent1 ent0 ent1 ent0 (Phy) (Vir) (Vir) (Vir) (Vir) VID PVID PVID PVID PVID VID Hypervisor 2 1 1 2 1 2 This Link must be configured to forward dot1q-tagged frames. Cisco Catalyst 27 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
28.
Matching Network Parameters
between IBM System p and CISCO Networks Show trunk configuration on switch interfaces VIOS 1 Switch#show interface Gi0/1 switchport en2 (if) [...] Name: Gi0/1 ent2 Switchport: Enabled (SEA) Administrative Mode: dynamic auto Operational Mode: down Administrative Trunking Encapsulation: negotiate ent0 ent1 Operational Trunking Encapsulation: native (Phy) (Vir) Negotiation of Trunking: Off PVID 1 Access Mode VLAN: 1 (default) PHYP Trunking Native Mode VLAN: 1 (default) VID 2 VLAN 1 Administrative Native VLAN tagging: enabled Voice VLAN: none Tag VLAN 2 Administrative private-vlan host-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk native VLAN: none Administrative private-vlan trunk Native VLAN tagging: enabled Only untagged frames are Administrative private-vlan trunk encapsulation: dot1q VLAN 1 forwarded to the VIO server and Administrative private-vlan trunk normal VLANs: none accepted by the switch. Administrative private-vlan trunk private VLANs: none Operational private-vlan: none Trunking VLANs Enabled: ALL Tag VLAN 2 Pruning VLANs Enabled: 2-1001 Capture Mode Disabled Capture VLANs Allowed: ALL VLAN 1 28 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
29.
Matching Network Parameters
between IBM System p and CISCO Networks Default switchport configuration By default Switchport role depends on configuration on the other site. Possible Roles are: – Trunk – Access Administrative Trunking Encapsulation – Dot1q is standard on newer switch models and IOS Versions – Dynamic if ISL is an option Access Mode VLAN – By default a switchport is configured as an access port – VLAN membership: VLAN 1 29 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
30.
Matching Network Parameters
between IBM System p and CISCO Networks Default switchport configuration A default switchport configuration… – accepts only untagged frames. – does only support multiple VLANs if neighbor device negotiates a VLAN trunk. – will forward all untagged frames from the VIO Server to VLAN 1 on the switch, regardless of their original VLAN memberships. – is vulnerable by negotiation messages 30 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
31.
Matching Network Parameters
between IBM System p and CISCO Networks Configure multiple VLAN support on Cisco IOS VIOS 1 en2 switch(config)#interface gi0/1 (if) switch(config-if)#switchport mode trunk ent2 (SEA) 5w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down ent0 ent1 (Phy) (Vir) 5w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface PVID 1 PHYP GigabitEthernet0/1, changed state to up VID 2 VLAN 1 Tag VLAN 2 VLAN 1 Now the switch forwards untagged frames to the VIO server and accept them from VIO server as well. Tag VLAN 2 31 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
32.
Matching Network Parameters
between IBM System p and CISCO Networks Configure multiple VLAN support on Cisco IOS VIOS 1 switch#show interface gi0/1 switchport en2 Name: Gi0/1 (if) Switchport: Enabled Administrative Mode: trunk ent2 Operational Mode: trunk (SEA) Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On ent0 ent1 Access Mode VLAN: 1 (default) (Phy) (Vir) Trunking Native Mode VLAN: 1 (default) Voice VLAN: none Gigabit Ethernet 0/1 Administrative private-vlan host-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk native VLAN: none Administrative private-vlan trunk encapsulation: dot1q Administrative private-vlan trunk normal VLANs: none Administrative private-vlan trunk private VLANs: none Operational private-vlan: none Trunking VLANs Enabled: ALL Pruning VLANs Enabled: 2-1001 Capture Mode Disabled Capture VLANs Allowed: ALL Protected: false Unknown unicast blocked: disabled Unknown multicast blocked: disabled Appliance trust: none 32 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
33.
Matching Network Parameters
between IBM System p and CISCO Networks Define allowed VLANs on a trunk VIOS 1 en2 (if) ent2 SEA bridges all tagged frames (SEA) ent0 ent1 (Phy) (Vir) VLAN border PVID 1 PHYP VLAN 1 VID 2 By default the switch will forward all tagged frames Tag VLAN 2 to the VIO server VLAN 1 The Hypervisor switch drops the VLANs which are Tag VLAN 2 not defined as VID. Tag VLAN 5 The SEA is still bridging all frames Tag VLAN 100 Consumes CPU time in VIO server Tag VLAN 99 May be a security issue 33 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation
34.
Matching Network Parameters
between IBM System p and CISCO Networks Define allowed VLANs on a trunk VIOS 1 en2 (if) switch(config-if)# switchport trunk allowed vlan 1,2 ent2 (SEA) Switch will only forward frames for defined ent0 ent1 (Phy) (Vir) VLANs VLAN 1 PVID 1 PHYP VID 2 SEA must only bridge frames which are Tag VLAN 2 configured on the Hypervisor switch Reduced load on VIO server VLAN 1 Filtering is done in the physical network layer Tag VLAN 2 VLAN border Tag VLAN 5 Tag VLAN 100 Tag VLAN 99 34 Alexander Paul IBM System p, AIX & Linux Aktuell 2008 © 2007 IBM Corporation