BXadmin:Network

Layer 2

Current network diagram in DIA format is located at /afs/bx.psu.edu/admin/documents/bx_network-l2-<DATE>.dia

When updating, be sure to work on a copy, and update the date in the box in the upper left-hand corner.

Layer 3

VLAN 1 | MANAGEMENT | 10.1.1.0 /24, 2610:8:7800:25:: /64

• VLAN: 1 (MANAGEMENT)
• Netmask: 255.255.255.0
• Broadcast: 10.1.1.255
• Gateway: 10.1.1.1
• DNS: *.net.bx.psu.edu

Switches, IPMI interfaces, ESXi management, etc.

VLAN 230 | PRINTERS | 10.1.2.0 /24, 2610:8:7800:2a:: /64

• VLAN: 230 (PRINTERS)
• Netmask: 255.255.255.0
• Broadcast: 10.1.2.255
• Gateway: 10.1.2.1
• Usable IPs: .1 - .254
• Client IPs: 253
• DNS: *.printers.bx.psu.edu

Printers or other non-management-type devices.

VLAN 200 | PERSEPHONE | 10.1.4.0 /24, 2610:8:7800:2b:: /64

• VLAN: 200 (PERSEPHONE)
• Netmask: 255.255.255.0
• Broadcast: 10.1.4.255
• Gateway: 10.1.4.1
• DNS: *.persephone.bx.psu.edu

Persephone cluster.

VLAN 250 | UNAUTH | 10.1.5.0 /24

• VLAN: 250 (UNAUTH)
• Netmask: 255.255.255.0
• Broadcast: 10.1.5.255
• Gateway: 10.1.5.1
• DNS: *.unauth.bx.psu.edu

Radius dumps unauthorized ports in this VLAN. DNS blackhole.

VLAN 260 | QUARANTINE | 10.1.6.0 /24

• VLAN: 260 (QUARANTINE)
• Netmask: 255.255.255.0
• Broadcast: 10.1.6.255
• Gateway: 10.1.6.1
• DNS: *.quarantine.bx.psu.edu

Radius dumps quanrantined MACs and users in this VLAN. DNS blackhole.

VLAN 210 | LINNE | 192.168.2.0 /24

• VLAN: 210 (LINNE)
• Netmask: 255.255.255.0
• Broadcast: 192.168.2.255
• Gateway: 192.168.2.253
• DNS: *.linne.bx.psu.edu

linne cluster

VLAN 220 | GALAXY | 192.168.4.0 /24, 2610:8:7800:2c:: /64

• VLAN: 220 (GALAXY)
• Netmask: 255.255.255.0
• Broadcast: 192.168.4.255
• Gateway: 192.168.2.254
• DNS: *.g2.bx.psu.edu

galaxy

VLAN 100 | BX-WIRED | 128.118.200.0 /23, 2610:8:7800:14:: /64

• VLAN: 100 (BX-WIRED)
• Netmask: 255.255.254.0
• Broadcast: 128.118.201.255
• Gateway: 128.118.200.1, 2610:8:7800:14::1

Centrally managed machines. Machines that we have root on and/or control with cfengine.

VLAN 110 | DOT1X | 128.118.202.128 /25, 2610:8:7800:28:: /64

• VLAN: 110 (DOT1X)
• Netmask: 255.255.255.128
• Broadcast: 128.118.202.255
• Gateway: 128.118.202.129
• DNS: dot1x-128-118-202-N.bx.psu.edu

PAT Address | 128.118.202.254

PAT = Port Address Translation. This is similar to how SNAT works with iptables. A single public ip. This is preferred to just straight NAT, which on the ASA is one-to-one with a set translation expiration time. After the global IP range is used up, further outbound connections are dropped. A single PAT address supports up to 65,536 outbound connections (TCP sessions).

NAT config on ASA:

global (Outside) 1 128.118.202.254
nat (Bioinformatics) 1 192.168.2.0 255.255.255.0
nat (Bioinformatics) 1 192.168.4.0 255.255.255.0
nat (Bioinformatics) 1 10.1.0.0 255.255.0.0

Dynamically assigned with DHCP. 802.1x EAP-TTLS-PAP username/password login.

VLAN 120 | UNMANAGED | 128.118.202.0 /25, 2610:8:7800:29:: /64

• VLAN: 120 (UNMANAGED)
• Netmask: 255.255.255.128
• Broadcast: 128.118.202.127
• Gateway: 128.118.202.1
• DNS: custom or 128-118-202-N.bx.psu.edu

Statically assgined with DHCP based on MAC. Radius attributes defined in LDAP for the DHCP host entry.

VLAN 130 | GUEST | ?

• VLAN: 130 (GUEST)
• DNS: guest-128-118-202-N.bx.psu.edu

DHCP entries static in LDAP. Web authorization form to allow changing of the MAC address, restricted to PIs and other persons of repute. These entries will be periodically expired. Or, tie into EDUROAM somehow?

Not sure what addresses GUEST will use, or if it will be NAT'd.

Spanning Tree

We are using MSTP, with a single region.

Configuration Name: MST

MSTI 0 (IST)

• MANAGEMENT
• Root: switch-cisco-3750-1
• Mapped VLANs: 1

MSTI 1

• BX-WIRED, DOT1X, UNMANAGED
• Root: switch-cisco-3750-1
• Mapped VLANs: 100, 110, 120

MSTI 2

• PRINTERS, UNAUTH, QUARANTINE
• Root: switch-cisco-3750-1
• Mapped VLANs: 230, 250, 260

MSTI 3

• PERSEPHONE, LINNE
• Root: switch-hp-procurve-7
• Mapped VLANs: 200, 210

MSTI 4

• GALAXY
• Root: switch-dell-powerconnect-1
• Mapped VLANs: 220