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Update campus host attachment pattern to single-attached access

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This commit is contained in:
Damien Arnodo
2026-04-18 18:44:34 +00:00
parent ff15e90b5c
commit 2da238e3ae
12 changed files with 105 additions and 157 deletions
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49
README.md
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@@ -14,9 +14,16 @@ Key design choices:
- **eBGP** in both fabrics (underlay + EVPN overlay) between spines and leafs / border leafs. - **eBGP** in both fabrics (underlay + EVPN overlay) between spines and leafs / border leafs.
- **OSPF area 0 + eBGP multi-hop** between each Border Leaf pair and both Core routers (over dot1q subinterfaces: `.100` = default VRF underlay, `.200` = VRF `gold`). - **OSPF area 0 + eBGP multi-hop** between each Border Leaf pair and both Core routers (over dot1q subinterfaces: `.100` = default VRF underlay, `.200` = VRF `gold`).
- **MLAG** everywhere there is dual-homing (leaf pairs, border-leaf pairs, access → leafs, host → access). - **MLAG** everywhere there is dual-homing at the fabric layers (leaf pairs, border-leaf pairs, access → leafs, and DC host → access).
- **Host attachment pattern**:
- **DC hosts** (servers) are **dual-homed via LACP** to an access switch — typical DC
server redundancy.
- **Campus hosts** (user endpoints: PC, phone, printer) are **single-attached** to a
Campus access switch via one plain Ethernet link. Redundancy lives at the access-switch
layer (the access switch itself is dual-homed via LACP to its leaf MLAG pair), not at
the host.
- **VRF `gold`** is stretched end-to-end: DC leafs (VLAN 34 / 78) ↔ DC-BL ↔ Core ↔ Campus-BL ↔ Campus leafs (VLAN 60 / 70), all sharing L3 VNI `100001`. - **VRF `gold`** is stretched end-to-end: DC leafs (VLAN 34 / 78) ↔ DC-BL ↔ Core ↔ Campus-BL ↔ Campus leafs (VLAN 60 / 70), all sharing L3 VNI `100001`.
- **VLAN 50** is a campus-local L2 VXLAN stretched between the two Campus VTEPs. - **VLAN 50** remains defined as a campus-local L2 VXLAN stretched between the two Campus VTEPs (infrastructure-only, not wired to any host in the current topology).
- **Convention**: L2 VNI = `110000 + vlan_id`, L3 VNI = `100001` for VRF `gold`, RT `1:100001` in both fabrics. - **Convention**: L2 VNI = `110000 + vlan_id`, L3 VNI = `100001` for VRF `gold`, RT `1:100001` in both fabrics.
## 📐 Topology ## 📐 Topology
@@ -93,16 +100,23 @@ docker exec -it clab-arista-evpn-fabric-border-leaf-dc1 Cli
### Access Switches ### Access Switches
| Access Switch | Uplink Pair | VLANs | Host | | Access Switch | Uplink Pair | VLANs | Host | Host attachment |
| --------------- | ------------------------ | -------- | -------------- | | --------------- | ------------------------ | -------- | -------------- | ------------------------- |
| access1 | leaf1/2 (VTEP1) | 40 | host1 | | access1 | leaf1/2 (VTEP1) | 40 | host1 | LACP Po1 (dual-homed) |
| access2 | leaf3/4 (VTEP2) | 34 | host2 | | access2 | leaf3/4 (VTEP2) | 34 | host2 | LACP Po1 (dual-homed) |
| access3 | leaf5/6 (VTEP3) | 40 | host3 | | access3 | leaf5/6 (VTEP3) | 40 | host3 | LACP Po1 (dual-homed) |
| access4 | leaf7/8 (VTEP4) | 78 | host4 | | access4 | leaf7/8 (VTEP4) | 78 | host4 | LACP Po1 (dual-homed) |
| campus-access1 | campus-leaf1/2 (VTEP1) | 50, 60 | campus-host1 | | campus-access1 | campus-leaf1/2 (VTEP1) | 60 | campus-host1 | access port (single link) |
| campus-access2 | campus-leaf3/4 (VTEP2) | 50, 70 | campus-host2 | | campus-access2 | campus-leaf3/4 (VTEP2) | 70 | campus-host2 | access port (single link) |
All access switches are L2-only, LACP-bonded to their leaf MLAG pair via `Port-Channel10`, with host downlinks on `Port-Channel1`. MSTP + edge-port BPDU guard. All access switches are L2-only, LACP-bonded to their leaf MLAG pair via `Port-Channel10`. MSTP + edge-port BPDU guard.
Host-facing ports:
- **DC access switches** run a `Port-Channel1` trunk (VLANs allowed per host) for a host
dual-homed in LACP (two physical links, one bond on the Linux side).
- **Campus access switches** use a plain `Ethernet3` in `switchport mode access` with
BPDU guard + portfast — the host connects with a single Ethernet link and no bonding.
## 🧭 IP Addressing Plan ## 🧭 IP Addressing Plan
@@ -171,11 +185,12 @@ Gateway: `172.16.0.254`.
| host2 | 34 | gold | 10.34.34.102/24 | 10.34.34.1 | DC L3 VRF gold | | host2 | 34 | gold | 10.34.34.102/24 | 10.34.34.1 | DC L3 VRF gold |
| host3 | 40 | default | 10.40.40.103/24 | — | DC L2 stretched | | host3 | 40 | default | 10.40.40.103/24 | — | DC L2 stretched |
| host4 | 78 | gold | 10.78.78.104/24 | 10.78.78.1 | DC L3 VRF gold | | host4 | 78 | gold | 10.78.78.104/24 | 10.78.78.1 | DC L3 VRF gold |
| campus-host1 | 50 | default | 10.50.50.101/24 | — | Campus L2 stretched (VTEP1↔VTEP2) |
| campus-host1 | 60 | gold | 10.60.60.101/24 | 10.60.60.1 | Campus L3 VRF gold | | campus-host1 | 60 | gold | 10.60.60.101/24 | 10.60.60.1 | Campus L3 VRF gold |
| campus-host2 | 50 | default | 10.50.50.102/24 | — | Campus L2 stretched |
| campus-host2 | 70 | gold | 10.60.70.102/24 | 10.60.70.1 | Campus L3 VRF gold | | campus-host2 | 70 | gold | 10.60.70.102/24 | 10.60.70.1 | Campus L3 VRF gold |
> DC hosts are dual-homed in LACP over `bond0` with tagged VLAN sub-interfaces.
> Campus hosts are single-attached with one untagged `eth1` in a single access VLAN.
## 🏷️ VXLAN Network Identifiers ## 🏷️ VXLAN Network Identifiers
### L2 VNI Mapping ### L2 VNI Mapping
@@ -266,15 +281,17 @@ docker exec -it clab-arista-evpn-fabric-host2 ping -c 3 10.78.78.104
### Intra-Campus connectivity ### Intra-Campus connectivity
```bash Campus hosts sit in VRF `gold` — use the L3 test to validate VTEP1↔VTEP2 via campus spines.
# L2 VLAN 50: campus-host1 ↔ campus-host2
docker exec -it clab-arista-evpn-fabric-campus-host1 ping -c 3 10.50.50.102
```bash
# L3 VRF gold (Campus only): campus-host1 ↔ campus-host2 # L3 VRF gold (Campus only): campus-host1 ↔ campus-host2
docker exec -it clab-arista-evpn-fabric-campus-host1 ping -c 3 10.60.70.102 docker exec -it clab-arista-evpn-fabric-campus-host1 ping -c 3 10.60.70.102
docker exec -it clab-arista-evpn-fabric-campus-host2 ping -c 3 10.60.60.101 docker exec -it clab-arista-evpn-fabric-campus-host2 ping -c 3 10.60.60.101
``` ```
> VLAN 50 (stretched L2 VXLAN) is still provisioned on the campus VTEPs as an
> infrastructure example but is not wired to any host in the current topology.
### End-to-end Campus ↔ DC (VRF gold via Core) ### End-to-end Campus ↔ DC (VRF gold via Core)
```bash ```bash

16
assets/arista-evpn-fabric.svg
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@@ -84,10 +84,10 @@
<text class="sub-label" x="150" y="310" text-anchor="middle">VTEP1 (AS 66001)</text> <text class="sub-label" x="150" y="310" text-anchor="middle">VTEP1 (AS 66001)</text>
<text class="sub-label" x="350" y="310" text-anchor="middle">VTEP2 (AS 66002)</text> <text class="sub-label" x="350" y="310" text-anchor="middle">VTEP2 (AS 66002)</text>
<text class="sub-label" x="300" y="450" text-anchor="middle">Campus Border Leafs MLAG (AS 66005)</text> <text class="sub-label" x="300" y="450" text-anchor="middle">Campus Border Leafs MLAG (AS 66005)</text>
<text class="sub-label" x="140" y="700" text-anchor="middle">VLAN 50 (10.50.50.101)</text> <text class="sub-label" x="140" y="700" text-anchor="middle">VLAN 60 (10.60.60.101, gold)</text>
<text class="sub-label" x="140" y="714" text-anchor="middle">VLAN 60 (10.60.60.101, gold)</text> <text class="sub-label" x="140" y="714" text-anchor="middle">single-attached (access)</text>
<text class="sub-label" x="360" y="700" text-anchor="middle">VLAN 50 (10.50.50.102)</text> <text class="sub-label" x="360" y="700" text-anchor="middle">VLAN 70 (10.60.70.102, gold)</text>
<text class="sub-label" x="360" y="714" text-anchor="middle">VLAN 70 (10.60.70.102, gold)</text> <text class="sub-label" x="360" y="714" text-anchor="middle">single-attached (access)</text>
<!-- Campus spine->leaf links --> <!-- Campus spine->leaf links -->
<path class="link" d="M 195 174 L 100 260"/> <path class="link" d="M 195 174 L 100 260"/>
@@ -116,11 +116,9 @@
<path class="link" d="M 300 294 L 360 530"/> <path class="link" d="M 300 294 L 360 530"/>
<path class="link" d="M 400 294 L 360 530"/> <path class="link" d="M 400 294 L 360 530"/>
<!-- Campus access -> hosts (dual) --> <!-- Campus access -> hosts (single link, enterprise user endpoint) -->
<path class="link" d="M 130 560 L 130 640"/> <path class="link" d="M 140 560 L 140 640"/>
<path class="link" d="M 150 560 L 150 640"/> <path class="link" d="M 360 560 L 360 640"/>
<path class="link" d="M 350 560 L 350 640"/>
<path class="link" d="M 370 560 L 370 640"/>
<!-- =============== CORE =============== --> <!-- =============== CORE =============== -->
<g class="node node-core"> <g class="node node-core">
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22
configs/campus-access1.cfg
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@@ -15,9 +15,6 @@ management api gnmi
username admin privilege 15 role network-admin secret sha512 $6$xQktFrbdeqEhVzLM$.1wOJB25nw2fqYaSXDu6y4mo6AP9hngMCFe2vGDl84hWoz00Q.4unoEBqspNI0HEoRz.OZhdBHqQv12KABf0B0 username admin privilege 15 role network-admin secret sha512 $6$xQktFrbdeqEhVzLM$.1wOJB25nw2fqYaSXDu6y4mo6AP9hngMCFe2vGDl84hWoz00Q.4unoEBqspNI0HEoRz.OZhdBHqQv12KABf0B0
! !
! VLANs ! VLANs
vlan 50
name test-l2-vxlan-campus
!
vlan 60 vlan 60
name vrf-gold-campus-subnet1 name vrf-gold-campus-subnet1
! !
@@ -41,25 +38,16 @@ interface Ethernet2
interface Port-Channel10 interface Port-Channel10
description uplink-to-campus-leaf-mlag description uplink-to-campus-leaf-mlag
switchport mode trunk switchport mode trunk
switchport trunk allowed vlan 50,60 switchport trunk allowed vlan 60
no shutdown no shutdown
! !
! Host-facing downlink (Port-Channel 1) ! Host-facing access port (single-attached endpoint in VLAN 60)
interface Ethernet3 interface Ethernet3
description campus-host1 description campus-host1
channel-group 1 mode active switchport mode access
! switchport access vlan 60
interface Ethernet4
description campus-host1
channel-group 1 mode active
!
interface Port-Channel1
description campus-host1
switchport mode trunk
switchport trunk allowed vlan 50,60
port-channel lacp fallback timeout 5
port-channel lacp fallback individual
spanning-tree portfast spanning-tree portfast
spanning-tree bpduguard enable
no shutdown no shutdown
! !
! Default route for management ! Default route for management

22
configs/campus-access2.cfg
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@@ -15,9 +15,6 @@ management api gnmi
username admin privilege 15 role network-admin secret sha512 $6$xQktFrbdeqEhVzLM$.1wOJB25nw2fqYaSXDu6y4mo6AP9hngMCFe2vGDl84hWoz00Q.4unoEBqspNI0HEoRz.OZhdBHqQv12KABf0B0 username admin privilege 15 role network-admin secret sha512 $6$xQktFrbdeqEhVzLM$.1wOJB25nw2fqYaSXDu6y4mo6AP9hngMCFe2vGDl84hWoz00Q.4unoEBqspNI0HEoRz.OZhdBHqQv12KABf0B0
! !
! VLANs ! VLANs
vlan 50
name test-l2-vxlan-campus
!
vlan 70 vlan 70
name vrf-gold-campus-subnet2 name vrf-gold-campus-subnet2
! !
@@ -41,25 +38,16 @@ interface Ethernet2
interface Port-Channel10 interface Port-Channel10
description uplink-to-campus-leaf-mlag description uplink-to-campus-leaf-mlag
switchport mode trunk switchport mode trunk
switchport trunk allowed vlan 50,70 switchport trunk allowed vlan 70
no shutdown no shutdown
! !
! Host-facing downlink (Port-Channel 1) ! Host-facing access port (single-attached endpoint in VLAN 70)
interface Ethernet3 interface Ethernet3
description campus-host2 description campus-host2
channel-group 1 mode active switchport mode access
! switchport access vlan 70
interface Ethernet4
description campus-host2
channel-group 1 mode active
!
interface Port-Channel1
description campus-host2
switchport mode trunk
switchport trunk allowed vlan 50,70
port-channel lacp fallback timeout 5
port-channel lacp fallback individual
spanning-tree portfast spanning-tree portfast
spanning-tree bpduguard enable
no shutdown no shutdown
! !
! Default route for management ! Default route for management

2
configs/campus-leaf1.cfg
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@@ -101,7 +101,7 @@ interface Ethernet1
interface Port-Channel1 interface Port-Channel1
description campus-access1 description campus-access1
switchport mode trunk switchport mode trunk
switchport trunk allowed vlan 50,60 switchport trunk allowed vlan 60
mlag 1 mlag 1
port-channel lacp fallback timeout 5 port-channel lacp fallback timeout 5
port-channel lacp fallback individual port-channel lacp fallback individual

2
configs/campus-leaf2.cfg
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@@ -101,7 +101,7 @@ interface Ethernet1
interface Port-Channel1 interface Port-Channel1
description campus-access1 description campus-access1
switchport mode trunk switchport mode trunk
switchport trunk allowed vlan 50,60 switchport trunk allowed vlan 60
mlag 1 mlag 1
port-channel lacp fallback timeout 5 port-channel lacp fallback timeout 5
port-channel lacp fallback individual port-channel lacp fallback individual

2
configs/campus-leaf3.cfg
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@@ -101,7 +101,7 @@ interface Ethernet1
interface Port-Channel1 interface Port-Channel1
description campus-access2 description campus-access2
switchport mode trunk switchport mode trunk
switchport trunk allowed vlan 50,70 switchport trunk allowed vlan 70
mlag 1 mlag 1
port-channel lacp fallback timeout 5 port-channel lacp fallback timeout 5
port-channel lacp fallback individual port-channel lacp fallback individual

2
configs/campus-leaf4.cfg
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@@ -101,7 +101,7 @@ interface Ethernet1
interface Port-Channel1 interface Port-Channel1
description campus-access2 description campus-access2
switchport mode trunk switchport mode trunk
switchport trunk allowed vlan 50,70 switchport trunk allowed vlan 70
mlag 1 mlag 1
port-channel lacp fallback timeout 5 port-channel lacp fallback timeout 5
port-channel lacp fallback individual port-channel lacp fallback individual

50
evpn-lab.clab.yml
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@@ -267,33 +267,19 @@ topology:
mgmt-ipv4: 172.16.0.62 mgmt-ipv4: 172.16.0.62
startup-config: configs/campus-access2.cfg startup-config: configs/campus-access2.cfg
# Campus Hosts - dual-homed with LACP bonding # Campus Hosts - single-attached to access switch (enterprise user endpoint pattern)
campus-host1: campus-host1:
kind: linux kind: linux
mgmt-ipv4: 172.16.0.105 mgmt-ipv4: 172.16.0.105
image: ghcr.io/hellt/network-multitool image: ghcr.io/hellt/network-multitool
cap-add: cap-add:
- NET_ADMIN - NET_ADMIN
binds:
- hosts/campus-host1_interfaces:/etc/network/interfaces
exec: exec:
- ip link add bond0 type bond mode 802.3ad
- ip link set dev bond0 type bond xmit_hash_policy layer3+4
- ip link set dev eth1 down
- ip link set dev eth2 down
- ip link set eth1 master bond0
- ip link set eth2 master bond0
- ip link set dev eth1 up - ip link set dev eth1 up
- ip link set dev eth2 up - ip addr add 10.60.60.101/24 dev eth1
- ip link set dev bond0 type bond lacp_rate fast - ip route add default via 10.60.60.1
- ip link set dev bond0 up
- ip link add link bond0 name bond0.50 type vlan id 50
- ip link set bond0.50 up
- ip addr add 10.50.50.101/24 dev bond0.50
- ip link add link bond0 name bond0.60 type vlan id 60
- ip link set bond0.60 up
- ip addr add 10.60.60.101/24 dev bond0.60
- ip route add 10.60.70.0/24 via 10.60.60.1
- ip route add 10.34.34.0/24 via 10.60.60.1
- ip route add 10.78.78.0/24 via 10.60.60.1
campus-host2: campus-host2:
kind: linux kind: linux
@@ -301,26 +287,12 @@ topology:
image: ghcr.io/hellt/network-multitool image: ghcr.io/hellt/network-multitool
cap-add: cap-add:
- NET_ADMIN - NET_ADMIN
binds:
- hosts/campus-host2_interfaces:/etc/network/interfaces
exec: exec:
- ip link add bond0 type bond mode 802.3ad
- ip link set dev bond0 type bond xmit_hash_policy layer3+4
- ip link set dev eth1 down
- ip link set dev eth2 down
- ip link set eth1 master bond0
- ip link set eth2 master bond0
- ip link set dev eth1 up - ip link set dev eth1 up
- ip link set dev eth2 up - ip addr add 10.60.70.102/24 dev eth1
- ip link set dev bond0 type bond lacp_rate fast - ip route add default via 10.60.70.1
- ip link set dev bond0 up
- ip link add link bond0 name bond0.50 type vlan id 50
- ip link set bond0.50 up
- ip addr add 10.50.50.102/24 dev bond0.50
- ip link add link bond0 name bond0.70 type vlan id 70
- ip link set bond0.70 up
- ip addr add 10.60.70.102/24 dev bond0.70
- ip route add 10.60.60.0/24 via 10.60.70.1
- ip route add 10.34.34.0/24 via 10.60.70.1
- ip route add 10.78.78.0/24 via 10.60.70.1
links: links:
# ===================================================== # =====================================================
@@ -428,8 +400,6 @@ topology:
- endpoints: ["campus-leaf3:eth1", "campus-access2:eth1"] - endpoints: ["campus-leaf3:eth1", "campus-access2:eth1"]
- endpoints: ["campus-leaf4:eth1", "campus-access2:eth2"] - endpoints: ["campus-leaf4:eth1", "campus-access2:eth2"]
# Campus Host connections to access switches (dual-homed via LACP) # Campus Host connections to access switches (single link, enterprise user endpoint)
- endpoints: ["campus-access1:eth3", "campus-host1:eth1"] - endpoints: ["campus-access1:eth3", "campus-host1:eth1"]
- endpoints: ["campus-access1:eth4", "campus-host1:eth2"]
- endpoints: ["campus-access2:eth3", "campus-host2:eth1"] - endpoints: ["campus-access2:eth3", "campus-host2:eth1"]
- endpoints: ["campus-access2:eth4", "campus-host2:eth2"]

45
hosts/README.md
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@@ -13,8 +13,12 @@ This directory contains network interface configuration files for Alpine Linux h
### Campus hosts ### Campus hosts
- `campus-host1_interfaces` - Configuration for campus-host1 (VLAN 50 stretched L2 10.50.50.101, VLAN 60 VRF gold 10.60.60.101) Campus hosts are **single-attached** to a Campus access switch (enterprise user endpoint
- `campus-host2_interfaces` - Configuration for campus-host2 (VLAN 50 stretched L2 10.50.50.102, VLAN 70 VRF gold 10.60.70.102) pattern — no LACP bond, no VLAN trunking on the host side). Each host sits in a single
access VLAN that maps to VRF `gold`.
- `campus-host1_interfaces` - Configuration for campus-host1 (VLAN 60 VRF gold 10.60.60.101/24, GW 10.60.60.1)
- `campus-host2_interfaces` - Configuration for campus-host2 (VLAN 70 VRF gold 10.60.70.102/24, GW 10.60.70.1)
## Usage ## Usage
@@ -30,7 +34,9 @@ host1:
## Format ## Format
Files use Debian/Alpine ifupdown format with bonding and VLAN extensions: Files use Debian/Alpine ifupdown format.
### DC hosts (dual-homed via LACP to access switches)
``` ```
auto lo auto lo
@@ -50,20 +56,39 @@ iface bond0.<vlan> inet static
vlan-raw-device bond0 vlan-raw-device bond0
``` ```
### Campus hosts (single-attached, no bonding, no VLAN tagging)
```
auto lo
iface lo inet loopback
auto eth1
iface eth1 inet static
address <ip-address>/<mask>
gateway <gateway>
```
## Key Concepts ## Key Concepts
### LACP Bonding ### DC: LACP Bonding
- All hosts use **mode 4** (802.3ad LACP) bonding - DC hosts use **mode 4** (802.3ad LACP) bonding
- Dual-homed to MLAG leaf pairs for redundancy - Dual-homed to MLAG leaf pairs — typical for DC servers that need NIC-level redundancy
- Requires matching LACP configuration on switches - Requires matching LACP configuration on switches
### Campus: Single-attached user endpoints
- Campus hosts use a single `eth1` interface connected to an access port
- Redundancy is handled at the access-switch layer (the access switch is itself
dual-homed via LACP to the leaf MLAG pair), not at the host
- This matches the realistic enterprise pattern for PCs, phones, printers, etc.
### VLAN Tagging ### VLAN Tagging
- Hosts handle VLAN tagging via sub-interfaces - DC hosts: VLAN tagging happens in the host via `bond0.<vlan_id>` sub-interfaces
- Format: `bond0.<vlan_id>` (e.g., bond0.40, bond0.34, bond0.78) (e.g., bond0.40, bond0.34, bond0.78); switch ports are trunks
- Switch ports are configured as trunks allowing specific VLANs - Campus hosts: no tagging on the host; the access switch places untagged frames
into `switchport access vlan <id>`
### IP Addressing ### IP Addressing
- Static IP configuration on VLAN sub-interfaces - Static IP configuration on the host interface (sub-interface for DC, `eth1` for Campus)
- Subnet assignment based on VLAN ID pattern (e.g., VLAN 40 = 10.40.40.0/24) - Subnet assignment based on VLAN ID pattern (e.g., VLAN 40 = 10.40.40.0/24)
## Modification ## Modification

25
hosts/campus-host1_interfaces
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@@ -1,26 +1,7 @@
auto lo auto lo
iface lo inet loopback iface lo inet loopback
auto bond0 auto eth1
iface bond0 inet manual iface eth1 inet static
use bond address 10.60.60.101/24
bond-slaves eth1 eth2
bond-mode 802.3ad
bond-miimon 100
bond-lacp-rate fast
up ip link set $IFACE up
auto bond0.50
iface bond0.50 inet static
address 10.50.50.101
netmask 255.255.255.0
vlan-raw-device bond0
up ip link set $IFACE up
auto bond0.60
iface bond0.60 inet static
address 10.60.60.101
netmask 255.255.255.0
gateway 10.60.60.1 gateway 10.60.60.1
vlan-raw-device bond0
up ip link set $IFACE up

25
hosts/campus-host2_interfaces
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@@ -1,26 +1,7 @@
auto lo auto lo
iface lo inet loopback iface lo inet loopback
auto bond0 auto eth1
iface bond0 inet manual iface eth1 inet static
use bond address 10.60.70.102/24
bond-slaves eth1 eth2
bond-mode 802.3ad
bond-miimon 100
bond-lacp-rate fast
up ip link set $IFACE up
auto bond0.50
iface bond0.50 inet static
address 10.50.50.102
netmask 255.255.255.0
vlan-raw-device bond0
up ip link set $IFACE up
auto bond0.70
iface bond0.70 inet static
address 10.60.70.102
netmask 255.255.255.0
gateway 10.60.70.1 gateway 10.60.70.1
vlan-raw-device bond0
up ip link set $IFACE up